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Search the site, search suggestions, my very unofficial tips on writing your college essay.

College application essays can seem really freaky and daunting.

If you’re nervous to write your essay, that’s good! That means you care! But, hopefully I’ve got some helpful, very unofficial tips here to make you feel a little more confident in writing this future masterpiece.

To clarify again: I’m just a shmuck. I have no say in the admissions process, and if I had the key to writing the perfect college essay, I would be a rich man sitting in a hot tub in Monaco. I am a shmuck. But I am a shmuck here for you .

Look at that shmucky face!

Because people like to emphasize how much academics, extracurricular activities, teacher recommendations, and the interview matter in the application process, the personal essay tends to be undervalued. But it is mucho importante (see, I took Spanish)! And you’re going to nail it! Here are my best tips:

MAKE IT UNIQUELY YOU

The personal essay is the only place in your entire application where the admissions officers have the ability to hear your own voice. While a lot of applications have similar academics or extracurricular activities in them, none of them of them have you in them. So, make yourself shine out through your essay.

Now, that doesn’t mean your essay has to be about how you’re going to end world hunger but if you are, that’s cool. What that does mean is that if someone was holding a stack of 1000 nameless college essays and dropped them in your school or at your house, that each of your friends, teachers, and family members would be able to pick out your essay. Your personal essay is also not Mrs. Smith’s English paper on Hamlet . Write your personal essay in your regular, every day voice. Your instinct might tell you to make this seem proper and elevated, and that instinct is baloney. So, keep that in mind when you…

PICK A TOPIC WHICH MATTERS TO YOU

Now, that doesn’t mean it has to be something really sad or emotional like when your bunny got hit by a car :(. And that doesn’t mean it has to be about something impressive about yourself like if you made your own jetpack and went to the moon. For the most part, the admissions officers can glean “impressive” information from your resume and academics, so I wouldn’t try to “impress” them here. But then again, the essay shouldn’t be prescriptive in topic. You can write about your mom, you can write about the time you went to McDonalds with your friends, you can write about anything. Brainstorm a ton of ideas! But try to write about something which really brings out your stellar personality. And write about something which you won’t get bored about because this essay is your baby and you’ll be dealing with it for a while.

START WRITING

There’s nothing worse than staring at a blank screen or paper. Inevitably, you’re going to go on Facebook or doze off and you won’t get anything accomplished. Just start writing. Once you get some words down on the page, you’ll get more ideas, and you’ll feel good.

Even if what you have on the page at first is stinky, the essay will at least start to take a shape.

WRITE A LOT

Write as much as you can about your topic. Even if it doesn’t really make sense, just pour those ideas down on the page. And then, when you’ve written everything you can possibly write down about your topic, it’s time to whittle that novel down into 650 words. For every sentence that gets into your essay, there’s probably going to be four that don’t. But that’s completely okay! You just gotta trim that fat. Of the essay I mean, although beach season is almost upon us.

And after you got that, there’s your essay. But you ain’t done yet!

REWRITE, REWRITE, REWRITE

The Great Gatsby wasn’t written in one draft. And neither was the Declaration of Independence I’m pretty sure. If you’re going to write a masterpiece (and you will), you have to revise and rewrite. Read your essay out loud. Does it sound weird? Fix that. Is it boring? Jazz it up a little. Then, rewrite it again to tell your story in the best way possible. Maybe for Mrs. Smith’s English paper, you could write in one draft and be fine with it. But with this, scary enough, a lot more people will read it, and these people don’t really know you. So, keep rewriting it until you’re proud of it. Or even when you’re not proud of it yet…

SHOW IT TO OTHER PEOPLE

Let your mom read it. Show it to your teacher. Show it to the milkman if you have one of those. People will love to read your essay.

As awkward as it is having other people read your essay, it’s necessary to get different pairs of eyes and perspectives on your essay. If they give criticism which you think rings true, great! If they give advice which you don’t agree with, great you don’t have to take it! Showing your essay to a bunch of people will inevitably make it stronger, but you just have to get over the initial awkwardness. Keep rewriting it and revising it and showing it to other people until…

ARE YOU PROUD OF IT?

If no, then keep rewriting. Or start from scratch if you think that’s best. Or pick a different topic, and write about that. Sometimes your essay can be like overcooked cookies, you can try to make them taste better by adding frosting or sprinkles or something but it might be better just to start over again. And that’s completely fine! Don’t get stuck in negativity, and also, don’t freak out.

If you are proud of it, well done. You’ve written your college essay, and I’m sure it’s awesome .

Dan Class of Alumni

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David Class of '25

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Denzel Class of '24

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How to Write the Harvard University Essays 2023-2024

Harvard University, perhaps the most prestigious and well-known institution in the world, is the nation’s oldest higher learning establishment with a founding date of 1636. Boasting an impressive alumni network from Sheryl Sandberg to Al Gore, it’s no surprise that Harvard recruits some of the top talents in the world.

It’s no wonder that students are often intimidated by Harvard’s extremely open-ended supplemental essays. However, CollegeVine is here to help and offer our guide on how to tackle Harvard’s supplemental essays. 

Read this Harvard essay example to inspire your own writing.

How to Write the Harvard University Supplemental Essays

Prompt 1: Harvard has long recognized the importance of enrolling a diverse student body. How will the life experiences that shape who you are today enable you to contribute to Harvard? (200 words)

Prompt 2: Briefly describe an intellectual experience that was important to you. (200 words)

Prompt 3: Briefly describe any of your extracurricular activities, employment experience, travel, or family responsibilities that have shaped who you are. (200 words)

Prompt 4: How do you hope to use your Harvard education in the future? (200 words)

Prompt 5: Top 3 things your roommates might like to know about you. (200 words)

Harvard has long recognized the importance of enrolling a diverse student body. How will the life experiences that shape who you are today enable you to contribute to Harvard? (200 words)

Brainstorming Your Topic

This prompt is a great example of the classic diversity supplemental essay . That means that, as you prepare to write your response, the first thing you need to do is focus in on some aspect of your identity, upbringing, or personality that makes you different from other people.

As you start brainstorming, do remember that the way colleges factor race into their admissions processes will be different this year, after the Supreme Court struck down affirmative action in June. Colleges can still consider race on an individual level, however, so if you would like to write your response about how your racial identity has impacted you, you are welcome to do so.

If race doesn’t seem like the right topic for you, however, keep in mind that there are many other things that can make us different, not just race, gender, sexuality, ethnicity, and the other aspects of our identities that people normally think of when they hear the word “diversity.” That’s not to say that you can’t write about those things, of course. But don’t worry if you don’t feel like those things have played a significant role in shaping your worldview. Here are some examples of other topics that could support a strong essay:

• Moving to several different cities because of your parents’ jobs
• An usual hobby, like playing the accordion or making your own jewelry
• Knowing a lot about a niche topic, like Scottish castles

The only questions you really need to ask yourself when picking a topic are “Does this thing set me apart from other people?” and “Will knowing this thing about me give someone a better sense of who I am overall?” As long as you can answer “yes” to both of those questions, you’ve found your topic!

Tips for Writing Your Essay

Once you’ve selected a topic, the question becomes how you’re going to write about that topic in a way that helps Harvard admissions officers better understand how you’re going to contribute to their campus community. To do that, you want to connect your topic to some broader feature of your personality, or to a meaningful lesson you learned, that speaks to your potential as a Harvard student.

For example, perhaps your interest in Scottish castles has given you an appreciation for the strength of the human spirit, as the Scots were able to persevere and build these structures even in incredibly remote, cold parts of the country. Alternatively, maybe being half Puerto Rican, but not speaking Spanish, has taught you about the power of family, as you have strong relationships even with relatives you can’t communicate with verbally. 

Remember that, like with any college essay, you want to rely on specific anecdotes and experiences to illustrate the points you’re making. To understand why, compare the following two excerpts from hypothetical essays.

Example 1: “Even though I can’t speak Spanish, and some of my relatives can’t speak English, whenever I visit my family in Puerto Rico I know it’s a place where I belong. The island is beautiful, and I especially love going to the annual party at my uncle’s house.”

Example 2: “The smell of the ‘lechón,’ or suckling pig greets me as soon as I enter my uncle’s home, even before everyone rushes in from the porch to welcome me in rapid-fire Spanish. At best, I understand one in every ten words, but my aunt’s hot pink glasses, the Caribbean Sea visible through the living room window, and of course, the smell of roasting pork, tell me, wordlessly yet undeniably, that I’m home.”

Think about how much better we understand this student after Example 2. If a few words were swapped out, Example 1 could’ve been written by anyone, whereas Example 2 paints us a clear picture of how this student’s Puerto Rican heritage has tangibly impacted their life.

Mistakes to Avoid

The biggest challenge with this particular “Diversity” essay is the word count. Because you only have 200 words to work with, you don’t have space to include more than one broader takeaway you’ve learned from this aspect of your identity. 

Of course, people are complicated, and you’ve likely learned many things from being Puerto Rican, or from being interested in Scottish castles. But for the sake of cohesion, focus on just one lesson. Otherwise your essay may end up feeling like a bullet-point list of Hallmark card messages, rather than a thoughtful, personal, reflective piece of writing.

The other thing you want to avoid is writing an essay that’s just about your topic. Particularly since you’re going to be writing about an aspect of your identity that’s important to you, you’ll likely have a lot to say just about that. If you aren’t careful, you may burn through all 200 words without getting to the broader significance of what this piece of your personality says about who you are as a whole. 

That component, however, is really the key to a strong response. Harvard receives over 40,000 applications a year, which means that, whether you write about being Puerto Rican or Scottish castles, it’s likely someone else is writing about something similar. 

That doesn’t mean you need to agonize over picking something absolutely nobody else is writing about, as that’s practically impossible. All it means is that you need to be clear about how this aspect of your identity has shaped you as a whole, as that is how your essay will stand out from others with similar topics.

Briefly describe an intellectual experience that was important to you. (200 words)

Harvard admissions officers are being considerate here, as they’re telling you explicitly what they would like you to write about. Of course, there are still nuances to the prompt, but in terms of brainstorming, just ask yourself: What is an intellectual experience that’s been important to me?

Keep in mind that “intellectual” doesn’t necessarily mean “academic.” You absolutely can write a great response about a paper, project, or some other experience you had through school. But you could also write about attending a performance by the Berlin Philharmonic, or about a book you read for fun that made a big impact on you. So long as the experience was intellectually stimulating, you can write a strong essay about it.

Once you’ve picked an experience, the key is to describe it in a way that shows Harvard admissions officers how this experience has prepared you to contribute to their classrooms, and campus community as a whole. In other words, don’t just tell them what you did, but also what you learned and why that matters for understanding what kind of college student you’ll be.

For example, say you choose to write about a debate project you did in your American history class, where you had to prepare for both sides and only learned which one you would actually be defending on the day of the debate. You could describe how, although you came into the project with pre-existing opinions about the topic, the preparation process taught you that, if you’re thoughtful and open-minded, you can usually find merit and logic even in the polar opposite position from your own.

Alternatively, you could write about a book you read that had been translated from Danish, and how reading it got you interested in learning more about how to translate a text as faithfully as possible. After watching many interviews with translators and reading a book about translation, you have learned that sometimes, the most literal translation doesn’t capture the spirit from the original language, which to you is proof that, in any piece of writing, the human element is at least as important as the words on the page.

Notice that both of these examples include broader reflections that zoom out from the particular experiences, to show what you took away from them: increased open-mindedness to different perspectives, for the first, and a more nuanced understanding of what makes art, art, in the case of the second. 

A strong response must include this kind of big-picture takeaway, as it shows readers two things. First, that you can reflect thoughtfully on your experiences and learn from them. And second, it shows them a skill or perspective you’d be bringing with you to Harvard, which gives them a better sense of how you’d fit into their campus community.

The only real thing you need to watch out for is accidentally selecting an experience that, for whatever reason, doesn’t allow you to incorporate the kind of bigger-picture takeaway described above. Maybe the experience just happened, so you’re still in the process of learning from it. Or maybe the lessons you learned are too nuanced to describe in 200 words. 

Whatever this reason, if you find yourself unable to articulate the broader significance of this experience, head back to the drawing board, to select one that works better for this prompt. What you don’t want to do is try to force in a takeaway that doesn’t really fit, as that will make your essay feel generic or disjointed, since the “moral of the story” won’t clearly connect to the story itself.

Briefly describe any of your extracurricular activities, employment experience, travel, or family responsibilities that have shaped who you are. (200 words)

This is a textbook example of the “Extracurricular” essay . As such, what you need to do is well-defined, although it’s easier said than done: select an extracurricular activity that has, as Harvard says, “shaped who you are,” and make sure you’re able to articulate how it’s been formative for you.

As you brainstorm which extracurricular you want to write about, note that the language of the prompt is pretty open-ended. You write about “any” activity, not just one you have a lot of accolades in, and you don’t even have to write about an activity—you can also write about a travel experience, or family responsibility. 

If the thing that immediately jumps to mind is a club, sport, volunteer experience, or other “traditional” extracurricular, that’s great! Run with that. But if you’re thinking and nothing in that vein seems quite right, or, alternatively, you’re feeling bold and want to take a creative approach, don’t be afraid to get outside the box. Here are some examples of other topics you could write a strong essay about:

• A more hobby-like extracurricular, like crocheting potholders and selling them on Etsy
• Driving the Pacific Coast Highway on your own
• Caring for your family’s two large, colorful macaws

These more creative topics can do a lot to showcase a different side of you, as college applications have, by their nature, a pretty restricted scope, and telling admissions officers about something that would never appear on your resume or transcript can teach them a lot about who you are. That being said, the most important thing is that the topic you pick has genuinely been formative for you. Whether it’s a conventional topic or not, as long as that personal connection is there, you’ll be able to write a strong essay about it.

The key to writing a strong response is focusing less on the activity itself, and more on what you’ve learned from your involvement in it. If you’re writing about a more conventional topic, remember that admissions officers already have your activities list. You don’t need to say “For the last five years, I’ve been involved in x,” because they already know that, and when you only have 200 words, wasting even 10 of them means you’ve wasted 5% of your space.

If you’re writing about something that doesn’t already show up elsewhere in your application, you want to provide enough details for your reader to understand what you did, but not more than that. For example, if you’re writing about your road trip, you don’t need to list every city you  stopped in. Instead, just mention one or two that were particularly memorable.

Rather than focusing on the facts and figures of what you did, focus on what you learned from your experience. Admissions officers want to know why your involvement in this thing matters to who you’ll be in college. So, think about one or two bigger picture things you learned from it, and center your response around those things.

For example, maybe your Etsy shop taught you how easy it is to bring some positivity into someone else’s life, as crocheting is something you would do anyways, and the shop just allows you to share your creations with other people. Showcasing this uplifting, altruistic side of yourself will help admissions officers better envision what kind of Harvard student you’d be.

As always, you want to use specific examples to support your points, at least as much as you can in 200 words. Because you’re dealing with a low word count, you probably won’t have space to flex your creative writing muscles with vivid, immersive descriptions. 

You can still incorporate anecdotes in a more economical way, however. For example, you could say “Every morning, our scarlet macaw ruffles her feathers and greets me with a prehistoric chirp.” You’re not going into detail about what her feathers look like, or where this scene is happening, but it’s still much more engaging than something like “My bird always says hello to me in her own way.”

The most common pitfall with an “Extracurricular” essay is describing your topic the way you would on your resume. Don’t worry about showing off some “marketable skill” you think admissions officers want to see, and instead highlight whatever it is you actually took away from this experience, whether it’s a skill, a realization, or a personality trait. The best college essays are genuine, as admissions officers feel that honesty, and know they’re truly getting to know the applicant as they are, rather than some polished-up version.

Additionally, keep in mind that, like with anything in your application, you want admissions officers to learn something new about you when reading this essay. So, if you’ve already written your common app essay about volunteering at your local animal shelter, you shouldn’t also write this essay about that experience. Your space in your application is already extremely limited, so don’t voluntarily limit yourself even further by repeating yourself when you’re given an opportunity to say something new.

How do you hope to use your Harvard education in the future? (200 words)

Although the packaging is a little different, this prompt has similarities to the classic “Why This College?” prompt . That means there are two main things you want to do while brainstorming. 

First, identify one or two goals you have for the future—with just 200 words, you won’t have space to elaborate on any more than that. Ideally, these should be relatively concrete. You don’t have to have your whole life mapped out, but you do need to be a lot more specific than “Make a difference in the world.” A more zoomed-in version of that goal would be something like “Contribute to conservation efforts to help save endangered species,” which would work.

Second, hop onto Harvard’s website and do some research on opportunities the school offers that would help you reach your goals. Again, make sure these are specific enough. Rather than a particular major, which is likely offered at plenty of other schools around the country, identify specific courses within that major you would like to take, or a professor in the department you would like to do research with. For example, the student interested in conservation might mention the course “Conservation Biology” at Harvard.

You could also write about a club, or a study abroad program, or really anything that’s unique to Harvard, so long as you’re able to draw a clear connection between the opportunity and your goal. Just make sure that, like with your goals, you don’t get overeager. Since your space is quite limited, you should choose two, or maximum three, opportunities to focus on. Any more than that and your essay will start to feel rushed and bullet point-y.

If you do your brainstorming well, the actual writing process should be pretty straightforward: explain your goals, and how the Harvard-specific opportunities you’ve selected will help you reach them. 

One thing you do want to keep in mind is that your goals should feel personal to you, and the best way to accomplish that is by providing some background context on why you have them. This doesn’t have to be extensive, as, again, your space is limited. But compare the following two examples, written about the hypothetical goal of helping conservation efforts from above, to get an idea of what we’re talking about:

Example 1: “As long as I can remember, I’ve loved all kinds of animals, and have been heartbroken by the fact that human destruction of natural resources could lead to certain species’ extinction.”

Example 2: “As a kid, I would sit in front of the aquarium’s walrus exhibit, admiring the animal’s girth and tusks, and dream about seeing one in the wild. Until my parents regretfully explained to me that, because of climate change, that was unlikely to ever happen.”

The second example is obviously longer, but not egregiously so: 45 words versus 31. And the image we get of this student sitting and fawning over a walrus is worth that extra space, as we feel a stronger personal connection to them, which in turn makes us more vicariously invested in their own goal of environmental advocacy.

As we’ve already described in the brainstorming section, the key to this essay is specificity. Admissions officers want you to paint them a picture of how Harvard fits into your broader life goals. As we noted earlier, that doesn’t mean you have to have everything figured out, but if you’re too vague about your goals, or how you see Harvard helping you reach them, admissions officers won’t see you as someone who’s prepared to contribute to their campus community.

Along similar lines, avoid flattery. Gushy lines like “At Harvard, every day I’ll feel inspired by walking the same halls that countless Nobel laureates, politicians, and CEOs once traversed” won’t get you anywhere, because Harvard admissions officers already know their school is one of the most prestigious and famous universities in the world. What they don’t know is what you are going to bring to Harvard that nobody else has. So, that’s what you want to focus on, not vague, surface-level attributes of Harvard related to its standing in the world of higher education.

Top 3 things your roommates might like to know about you. (200 words)

Like Prompt 2, this prompt tells you exactly what you need to brainstorm: three things a roommate would like to know about you. However, also like Prompt 2, while this prompt is direct, it’s also incredibly open-ended. What really are the top three things you’d like a complete stranger to know about you before you live together for nine months?

Questions this broad can be hard to answer, as you might not know where to start. Sometimes, you can help yourself out by asking yourself adjacent, but slightly more specific questions, like the following:

• Do you have any interests that influence your regular routine? For example, do you always watch the Seahawks on Sunday, or are you going to be playing Taylor Swift’s discography on repeat while you study?
• Look around your room—what items are most important to you? Do you keep your movie ticket stubs? Are you planning on taking your photos of your family cat with you to college?
• Are there any activities you love and already know you’d want to do with your roommate, like weekly face masks or making Christmas cookies?

Hopefully, these narrower questions, and the example responses we’ve included, help get your gears turning. Keep in mind that this prompt is a great opportunity to showcase sides of your personality that don’t come across in your grades, activities list, or even your personal statement. Don’t worry about seeming impressive—admissions officers don’t expect you to read Shakespeare every night for two hours. What they want is an honest, informative picture of what you’re like “behind the scenes,” because college is much more than just academics.

Once you’ve selected three things to write about, the key to the actual essay is presenting them in a logical, cohesive, efficient way. That’s easier said than done, particularly if the three things you’ve picked are quite different from each other. 

To ensure your essay feels like one, complete unit, rather than three smaller ones stuck together, strong transitions will be crucial. Note that “strong” doesn’t mean “lengthy.” Just a few words can go a long way towards helping your essay flow naturally. To see what we mean here, take the following two examples:

Example 1: “Just so you know, every Sunday I will be watching the Seahawks, draped in my dad’s Steve Largent jersey. They can be a frustrating team, but I’ll do my best to keep it down in case you’re studying. I also like to do facemasks, though. You’re always welcome to any of the ones I have in my (pretty extensive) collection.”

Example 2: “Just so you know, every Sunday I will be watching the Seahawks, draped in my dad’s Steve Largent jersey. But if football’s not your thing, don’t worry—once the game’s over, I’ll need to unwind anyways, because win or lose the Hawks always find a way to make things stressful. So always feel free to join me in picking out a face mask from my (pretty extensive) collection, and we can gear up for the week together.”

The content in both examples is the same, but in the first one, the transition from football to facemasks is very abrupt. On the other hand, in the second example the simple line “But if football’s not your thing, don’t worry” keeps things flowing smoothly. 

There’s no one right way to write a good transition, but as you’re polishing your essay a good way to see if you’re on the right track is by asking someone who hasn’t seen your essay before to read it over and tell you if there are any points that made them pause. If the answer is yes, your transitions probably still need more work.

Finally, you probably noticed that the above examples are both written in a “Dear roomie” style, as if you’re actually speaking directly to your roommate. You don’t have to take this exact approach, but your tone should ideally be light and fun. Living alone for the first time, with other people your age, is one of the best parts of college! Plus, college applications are, by their nature, pretty dry affairs for the most part. Lightening things up in this essay will give your reader a breath of fresh air, which will help them feel more engaged in your application as a whole.

Harvard is doing you a favor here by keeping the scope of the essay narrow—they ask for three things, not more. As we’ve noted many times with the other supplements, 200 words will be gone in a flash, so don’t try to cram in extra things. It’s not necessary to do that, because admissions officers have only asked for three, and trying to stuff more in will turn your essay into a list of bullet points, rather than an informative piece of writing about your personality.

Finally, as we’ve hinted at a few times above, the other thing you want to avoid is using this essay as another opportunity to impress admissions officers with your intellect and accomplishments. Remember, they have your grades, and your activities list, and all your other essays. Plus, they can ask you whatever questions they want—if they wanted to know about the most difficult book you’ve ever read, they would. So, loosen up, let your hair down, and show them you know how to have fun too!

Where to Get Your Harvard Essays Edited

Do you want feedback on your Harvard essays? After rereading your essays countless times, it can be difficult to evaluate your writing objectively. That’s why we created our free Peer Essay Review tool , where you can get a free review of your essay from another student. You can also improve your own writing skills by reviewing other students’ essays. 

If you want a college admissions expert to review your essay, advisors on CollegeVine have helped students refine their writing and submit successful applications to top schools.  Find the right advisor for you  to improve your chances of getting into your dream school!

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A Quick Guide to Harvard Referencing | Citation Examples

Published on 14 February 2020 by Jack Caulfield . Revised on 15 September 2023.

Referencing is an important part of academic writing. It tells your readers what sources you’ve used and how to find them.

Harvard is the most common referencing style used in UK universities. In Harvard style, the author and year are cited in-text, and full details of the source are given in a reference list .

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Harvard in-text citation, creating a harvard reference list, harvard referencing examples, referencing sources with no author or date, frequently asked questions about harvard referencing.

A Harvard in-text citation appears in brackets beside any quotation or paraphrase of a source. It gives the last name of the author(s) and the year of publication, as well as a page number or range locating the passage referenced, if applicable:

Note that ‘p.’ is used for a single page, ‘pp.’ for multiple pages (e.g. ‘pp. 1–5’).

An in-text citation usually appears immediately after the quotation or paraphrase in question. It may also appear at the end of the relevant sentence, as long as it’s clear what it refers to.

When your sentence already mentions the name of the author, it should not be repeated in the citation:

Sources with multiple authors

When you cite a source with up to three authors, cite all authors’ names. For four or more authors, list only the first name, followed by ‘ et al. ’:

Sources with no page numbers

Some sources, such as websites , often don’t have page numbers. If the source is a short text, you can simply leave out the page number. With longer sources, you can use an alternate locator such as a subheading or paragraph number if you need to specify where to find the quote:

Multiple citations at the same point

When you need multiple citations to appear at the same point in your text – for example, when you refer to several sources with one phrase – you can present them in the same set of brackets, separated by semicolons. List them in order of publication date:

Multiple sources with the same author and date

If you cite multiple sources by the same author which were published in the same year, it’s important to distinguish between them in your citations. To do this, insert an ‘a’ after the year in the first one you reference, a ‘b’ in the second, and so on:

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A bibliography or reference list appears at the end of your text. It lists all your sources in alphabetical order by the author’s last name, giving complete information so that the reader can look them up if necessary.

The reference entry starts with the author’s last name followed by initial(s). Only the first word of the title is capitalised (as well as any proper nouns).

Sources with multiple authors in the reference list

As with in-text citations, up to three authors should be listed; when there are four or more, list only the first author followed by ‘ et al. ’:

Reference list entries vary according to source type, since different information is relevant for different sources. Formats and examples for the most commonly used source types are given below.

• Entire book
• Book chapter
• Translated book
• Edition of a book

Journal articles

• Print journal
• Online-only journal with DOI
• Online-only journal with no DOI

• General web page
• Online article or blog
• Social media post

Sometimes you won’t have all the information you need for a reference. This section covers what to do when a source lacks a publication date or named author.

No publication date

When a source doesn’t have a clear publication date – for example, a constantly updated reference source like Wikipedia or an obscure historical document which can’t be accurately dated – you can replace it with the words ‘no date’:

Note that when you do this with an online source, you should still include an access date, as in the example.

When a source lacks a clearly identified author, there’s often an appropriate corporate source – the organisation responsible for the source – whom you can credit as author instead, as in the Google and Wikipedia examples above.

When that’s not the case, you can just replace it with the title of the source in both the in-text citation and the reference list:

Harvard referencing uses an author–date system. Sources are cited by the author’s last name and the publication year in brackets. Each Harvard in-text citation corresponds to an entry in the alphabetised reference list at the end of the paper.

Vancouver referencing uses a numerical system. Sources are cited by a number in parentheses or superscript. Each number corresponds to a full reference at the end of the paper.

A Harvard in-text citation should appear in brackets every time you quote, paraphrase, or refer to information from a source.

The citation can appear immediately after the quotation or paraphrase, or at the end of the sentence. If you’re quoting, place the citation outside of the quotation marks but before any other punctuation like a comma or full stop.

In Harvard referencing, up to three author names are included in an in-text citation or reference list entry. When there are four or more authors, include only the first, followed by ‘ et al. ’

Though the terms are sometimes used interchangeably, there is a difference in meaning:

• A reference list only includes sources cited in the text – every entry corresponds to an in-text citation .
• A bibliography also includes other sources which were consulted during the research but not cited.

Cite this Scribbr article

If you want to cite this source, you can copy and paste the citation or click the ‘Cite this Scribbr article’ button to automatically add the citation to our free Reference Generator.

Caulfield, J. (2023, September 15). A Quick Guide to Harvard Referencing | Citation Examples. Scribbr. Retrieved 11 June 2024, from https://www.scribbr.co.uk/referencing/harvard-style/

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Writing Application Essays and Personal Statements

Some applications ask that you write an essay that draws on more personal reflections. These essays, sometimes called Personal Statements, are an opportunity to show the selection committee who you are as a person: your story, your values, your interests, and why you—and not your peer with a similar resume—are a perfect fit for this opportunity. These narrative essays allow you to really illustrate the person behind the resume, showcasing not only what you think but how you think.

Before you start writing, it’s helpful to really consider the goals of your personal statement:

• To learn more about you as a person: What would you like the selection committee to know about you that can't be covered by other application materials (e.g. resume, transcript, letters of recommendation)? What have been the important moments/influences throughout your journey that have led to where (and who!) you are?
• To learn how you think about the unsolved problems in your field of study/interest: What experiences demonstrate how you've been taught to think and how you tackle challenges?
• To assess whether you fit with the personal qualities sought by the selection committee:  How can you show that you are thoughtful and mature with a good sense of self; that you embody the character, qualities, and experience to be personally ready to thrive in this experience (graduate school and otherwise)? Whatever opportunity you are seeking—going to graduate school, spending the year abroad, conducting public service—is going to be challenging intellectually, emotionally, and financially. This is your opportunity to show that you have the energy and perseverance to succeed.

In general, your job through your personal statement is to show, don’t tell the committee about your journey. If you choose to retell specific anecdotes from your life, focus on one or two relavant, formative experiences—academic, professional, extracurricular—that are emblematic of your development. The essay is where you should showcase the depth of your maturity, not the breadth—that's the resume's job!

Determining the theme of an essay

The personal statement is usually framed with an overarching theme. But how do you come up with a theme that is unique to you? Here are some questions to get you started:

• Question your individuality:  What distinguishes you from your peers? What challenges have you overcome? What was one instance in your life where your values were called  into question?
• Question your field of study:  What first interested you about your field of study? How has your interest in the field changed and developed? How has this discipline shaped you? What are you most passionate about relative to your field?
• Question your non-academic experiences:  Why did you choose the internships, clubs, or activites you did? And what does that suggest about what you value?

Once you have done some reflection, you may notice a theme emerging (justice? innovation? creativity?)—great! Be careful to think beyond your first idea, too, though. Sometimes, the third or fourth theme to come to your mind is the one that will be most compelling to center your essay around.

Writing style

Certainly, your personal statement can have moments of humor or irony that reflect your personality, but the goal is not to show off your creative writing skills or present you as a sparkling conversationalist (that can be part of your interview!). Here, the aim is to present yourself as an interesting person, with a unique background and perspective, and a great future colleague. You should still use good academic writing—although this is not a research paper nor a cover letter—but the tone can be a bit less formal.

Communicating your values

Our work is often linked to our own values, identities, and personal experiences, both positive and negative. However, there can be a vulnerability to sharing these things with strangers. Know that you don't have to write about your most intimate thoughts or experiences, if you don't want to. If you do feel that it’s important that a selection committee knows this about you, reflect on why you would like for them to know that, and then be sure that it has an organic place in your statement. Your passion will come through in how you speak about these topics and their importance in forming you as an individual and budding scholar. 

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Rhetoric: The Art of Persuasive Writing and Public Speaking

Gain critical communication skills in writing and public speaking with this introduction to American political rhetoric.

Associated Schools

Harvard Faculty of Arts & Sciences

What you'll learn.

When and how to employ a variety of rhetorical devices in writing and speaking

How to differentiate between argument and rhetorical technique

How to write a persuasive opinion editorial and short speech

How to evaluate the strength of an argument

How to identify logical fallacies in arguments

Course description

We are living in a contentious time in history. Fundamental disagreements on critical political issues make it essential to learn how to make an argument and analyze the arguments of others. This ability will help you engage in civil discourse and make effective changes in society. Even outside the political sphere, conveying a convincing message can benefit you throughout your personal, public, and professional lives.

This course is an introduction to the theory and practice of rhetoric, the art of persuasive writing and speech. In it, you will learn to construct and defend compelling arguments, an essential skill in many settings. We will be using selected addresses from prominent twentieth-century Americans — including Martin Luther King Jr., John F. Kennedy, Margaret Chase Smith, Ronald Reagan, and more — to explore and analyze rhetorical structure and style. Through this analysis, you will learn how speakers and writers persuade an audience to adopt their point of view.

Built around Harvard Professor James Engell’s on-campus course, “Elements of Rhetoric,” this course will help you analyze and apply rhetorical structure and style, appreciate the relevance of persuasive communication in your own life, and understand how to persuade and recognize when someone is trying to persuade you. You will be inspired to share your viewpoint and discover the most powerful ways to convince others to champion your cause. Join us to find your voice!

Course Outline

Introduction to Rhetoric

• Define the term "rhetoric."
• Articulate the importance of effective communication.
• Summarize the history of rhetorical study, from the ancient Greeks to the modern-day.
• Identify the parts of discourse.
• Define the three modes of appeal.
• Identify tropes and schemes, and explain their use in composition.
• Compose an opinion editorial on a topic of your choice.

Civil Rights - Martin Luther King, Jr.

• Analyze Martin Luther King, Jr.’s “I Have a Dream…” speech
• Define inductive reasoning and some of its associated topics
• Identify instances of inductive reasoning in writing and speech
• Define deductive reasoning and some of its associated topics
• Identify instances of deductive reasoning in writing and speech
• Recognize and evaluate the strength of an argument's refutation
• Apply the elements of rhetoric you have learned so far into the final draft of your op-ed

Gun Control - Sarah Brady and Charlton Heston

• Analyze Sarah Brady’s Democratic National Convention Keynote Speech.
• Analyze Charlton Heston’s speech on the Second Amendment.
• Define “inductive reasoning” and some of its associated topics
• Define “deductive reasoning” and some of its associated topics
• Recognize and evaluate the strength of an argument’s refutation
• Apply the elements of rhetoric you have learned so far in the final draft of your op-ed

Introduction to Oratory

• Describe the origins of the practice of oratory.
• Recognize ways in which orators tailor their writing for the spoken word.
• Describe techniques for effective public speaking, both prepared and extemporaneous.
• Brainstorm ideas for your own short speech.

The Red Scare - Joseph McCarthy and Margaret Chase Smith

• Analyze Joseph McCarthy’s “Enemies Within” speech.
• Analyze Margaret Chase Smith’s "A Declaration of Conscience" speech.
• Identify the modes of appeal and the logical reasoning of the featured speeches.
• Identify both common and special topics used in these speeches, like cause and effect, testimony, justice and injustice, and comparison, and begin to recognize their use in other speeches.
• Identify examples from these speeches of logical fallacies including the either/or fallacy, the fallacy of affirming the consequent, the argument ad hominem, the argument ad populum, begging the question, the complex question, and the use of imprecise language.
• Discuss the importance of winning and keeping an audience’s trust and the pros and cons of attempting to tear down their confidence in an opponent.
• Define for yourself the definition of "extremist rhetoric," debate its use as a political tool.
• Consider the moral responsibilities of those who would seek to persuade others through language.

Presidential Rhetoric - John F. Kennedy and Ronald Reagan

• Discuss how the audience and the desired tone for a speech can influence diction (word choice).
• Compare the effects of using passive vs. active voice, and first-person vs. other tenses in a speech.
• Discuss the effectiveness of the use of symbolism in writing and speech.
• Define hyperbole, antimetabole, and polysyndeton, and identify when these devices might be appropriate and useful in terms of persuasion.
• Describe techniques for connecting with your audience, including storytelling and drawing on shared experience.

Instructors

James Engell

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Generate accurate Harvard reference lists quickly and for FREE, with MyBib!

🤔 What is a Harvard Referencing Generator?

A Harvard Referencing Generator is a tool that automatically generates formatted academic references in the Harvard style.

It takes in relevant details about a source -- usually critical information like author names, article titles, publish dates, and URLs -- and adds the correct punctuation and formatting required by the Harvard referencing style.

The generated references can be copied into a reference list or bibliography, and then collectively appended to the end of an academic assignment. This is the standard way to give credit to sources used in the main body of an assignment.

👩‍🎓 Who uses a Harvard Referencing Generator?

Harvard is the main referencing style at colleges and universities in the United Kingdom and Australia. It is also very popular in other English-speaking countries such as South Africa, Hong Kong, and New Zealand. University-level students in these countries are most likely to use a Harvard generator to aid them with their undergraduate assignments (and often post-graduate too).

🙌 Why should I use a Harvard Referencing Generator?

A Harvard Referencing Generator solves two problems:

• It provides a way to organise and keep track of the sources referenced in the content of an academic paper.
• It ensures that references are formatted correctly -- inline with the Harvard referencing style -- and it does so considerably faster than writing them out manually.

A well-formatted and broad bibliography can account for up to 20% of the total grade for an undergraduate-level project, and using a generator tool can contribute significantly towards earning them.

⚙️ How do I use MyBib's Harvard Referencing Generator?

Here's how to use our reference generator:

• If citing a book, website, journal, or video: enter the URL or title into the search bar at the top of the page and press the search button.
• Choose the most relevant results from the list of search results.
• Our generator will automatically locate the source details and format them in the correct Harvard format. You can make further changes if required.
• Then either copy the formatted reference directly into your reference list by clicking the 'copy' button, or save it to your MyBib account for later.

MyBib supports the following for Harvard style:

🍏 What other versions of Harvard referencing exist?

There isn't "one true way" to do Harvard referencing, and many universities have their own slightly different guidelines for the style. Our generator can adapt to handle the following list of different Harvard styles:

• Cite Them Right
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• University of the West of England (UWE)

Daniel is a qualified librarian, former teacher, and citation expert. He has been contributing to MyBib since 2018.

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Why the Pandemic Probably Started in a Lab, in 5 Key Points

By Alina Chan

Dr. Chan is a molecular biologist at the Broad Institute of M.I.T. and Harvard, and a co-author of “Viral: The Search for the Origin of Covid-19.”

This article has been updated to reflect news developments.

On Monday, Dr. Anthony Fauci returned to the halls of Congress and testified before the House subcommittee investigating the Covid-19 pandemic. He was questioned about several topics related to the government’s handling of Covid-19, including how the National Institute of Allergy and Infectious Diseases, which he directed until retiring in 2022, supported risky virus work at a Chinese institute whose research may have caused the pandemic.

For more than four years, reflexive partisan politics have derailed the search for the truth about a catastrophe that has touched us all. It has been estimated that at least 25 million people around the world have died because of Covid-19, with over a million of those deaths in the United States.

Although how the pandemic started has been hotly debated, a growing volume of evidence — gleaned from public records released under the Freedom of Information Act, digital sleuthing through online databases, scientific papers analyzing the virus and its spread, and leaks from within the U.S. government — suggests that the pandemic most likely occurred because a virus escaped from a research lab in Wuhan, China. If so, it would be the most costly accident in the history of science.

Here’s what we now know:

1 The SARS-like virus that caused the pandemic emerged in Wuhan, the city where the world’s foremost research lab for SARS-like viruses is located.

• At the Wuhan Institute of Virology, a team of scientists had been hunting for SARS-like viruses for over a decade, led by Shi Zhengli.
• Their research showed that the viruses most similar to SARS‑CoV‑2, the virus that caused the pandemic, circulate in bats that live r oughly 1,000 miles away from Wuhan. Scientists from Dr. Shi’s team traveled repeatedly to Yunnan province to collect these viruses and had expanded their search to Southeast Asia. Bats in other parts of China have not been found to carry viruses that are as closely related to SARS-CoV-2.

The closest known relatives to SARS-CoV-2 were found in southwestern China and in Laos.

Large cities

Mine in Yunnan province

Cave in Laos

South China Sea

The closest known relatives to SARS-CoV-2

were found in southwestern China and in Laos.

philippines

The closest known relatives to SARS-CoV-2 were found

in southwestern China and Laos.

Sources: Sarah Temmam et al., Nature; SimpleMaps

Note: Cities shown have a population of at least 200,000.

There are hundreds of large cities in China and Southeast Asia.

There are hundreds of large cities in China

and Southeast Asia.

The pandemic started roughly 1,000 miles away, in Wuhan, home to the world’s foremost SARS-like virus research lab.

The pandemic started roughly 1,000 miles away,

in Wuhan, home to the world’s foremost SARS-like virus research lab.

The pandemic started roughly 1,000 miles away, in Wuhan,

home to the world’s foremost SARS-like virus research lab.

• Even at hot spots where these viruses exist naturally near the cave bats of southwestern China and Southeast Asia, the scientists argued, as recently as 2019 , that bat coronavirus spillover into humans is rare .
• When the Covid-19 outbreak was detected, Dr. Shi initially wondered if the novel coronavirus had come from her laboratory , saying she had never expected such an outbreak to occur in Wuhan.
• The SARS‑CoV‑2 virus is exceptionally contagious and can jump from species to species like wildfire . Yet it left no known trace of infection at its source or anywhere along what would have been a thousand-mile journey before emerging in Wuhan.

2 The year before the outbreak, the Wuhan institute, working with U.S. partners, had proposed creating viruses with SARS‑CoV‑2’s defining feature.

• Dr. Shi’s group was fascinated by how coronaviruses jump from species to species. To find viruses, they took samples from bats and other animals , as well as from sick people living near animals carrying these viruses or associated with the wildlife trade. Much of this work was conducted in partnership with the EcoHealth Alliance, a U.S.-based scientific organization that, since 2002, has been awarded over $80 million in federal funding to research the risks of emerging infectious diseases.
• The laboratory pursued risky research that resulted in viruses becoming more infectious : Coronaviruses were grown from samples from infected animals and genetically reconstructed and recombined to create new viruses unknown in nature. These new viruses were passed through cells from bats, pigs, primates and humans and were used to infect civets and humanized mice (mice modified with human genes). In essence, this process forced these viruses to adapt to new host species, and the viruses with mutations that allowed them to thrive emerged as victors.
• By 2019, Dr. Shi’s group had published a database describing more than 22,000 collected wildlife samples. But external access was shut off in the fall of 2019, and the database was not shared with American collaborators even after the pandemic started , when such a rich virus collection would have been most useful in tracking the origin of SARS‑CoV‑2. It remains unclear whether the Wuhan institute possessed a precursor of the pandemic virus.
• In 2021, The Intercept published a leaked 2018 grant proposal for a research project named Defuse , which had been written as a collaboration between EcoHealth, the Wuhan institute and Ralph Baric at the University of North Carolina, who had been on the cutting edge of coronavirus research for years. The proposal described plans to create viruses strikingly similar to SARS‑CoV‑2.
• Coronaviruses bear their name because their surface is studded with protein spikes, like a spiky crown, which they use to enter animal cells. T he Defuse project proposed to search for and create SARS-like viruses carrying spikes with a unique feature: a furin cleavage site — the same feature that enhances SARS‑CoV‑2’s infectiousness in humans, making it capable of causing a pandemic. Defuse was never funded by the United States . However, in his testimony on Monday, Dr. Fauci explained that the Wuhan institute would not need to rely on U.S. funding to pursue research independently.

The Wuhan lab ran risky experiments to learn about how SARS-like viruses might infect humans.

1. Collect SARS-like viruses from bats and other wild animals, as well as from people exposed to them.

2. Identify high-risk viruses by screening for spike proteins that facilitate infection of human cells.

2. Identify high-risk viruses by screening for spike proteins that facilitate infection of

human cells.

In Defuse, the scientists proposed to add a furin cleavage site to the spike protein.

3. Create new coronaviruses by inserting spike proteins or other features that could make the viruses more infectious in humans.

4. Infect human cells, civets and humanized mice with the new coronaviruses, to determine how dangerous they might be.

• While it’s possible that the furin cleavage site could have evolved naturally (as seen in some distantly related coronaviruses), out of the hundreds of SARS-like viruses cataloged by scientists, SARS‑CoV‑2 is the only one known to possess a furin cleavage site in its spike. And the genetic data suggest that the virus had only recently gained the furin cleavage site before it started the pandemic.
• Ultimately, a never-before-seen SARS-like virus with a newly introduced furin cleavage site, matching the description in the Wuhan institute’s Defuse proposal, caused an outbreak in Wuhan less than two years after the proposal was drafted.
• When the Wuhan scientists published their seminal paper about Covid-19 as the pandemic roared to life in 2020, they did not mention the virus’s furin cleavage site — a feature they should have been on the lookout for, according to their own grant proposal, and a feature quickly recognized by other scientists.
• Worse still, as the pandemic raged, their American collaborators failed to publicly reveal the existence of the Defuse proposal. The president of EcoHealth, Peter Daszak, recently admitted to Congress that he doesn’t know about virus samples collected by the Wuhan institute after 2015 and never asked the lab’s scientists if they had started the work described in Defuse. In May, citing failures in EcoHealth’s monitoring of risky experiments conducted at the Wuhan lab, the Biden administration suspended all federal funding for the organization and Dr. Daszak, and initiated proceedings to bar them from receiving future grants. In his testimony on Monday, Dr. Fauci said that he supported the decision to suspend and bar EcoHealth.
• Separately, Dr. Baric described the competitive dynamic between his research group and the institute when he told Congress that the Wuhan scientists would probably not have shared their most interesting newly discovered viruses with him . Documents and email correspondence between the institute and Dr. Baric are still being withheld from the public while their release is fiercely contested in litigation.
• In the end, American partners very likely knew of only a fraction of the research done in Wuhan. According to U.S. intelligence sources, some of the institute’s virus research was classified or conducted with or on behalf of the Chinese military . In the congressional hearing on Monday, Dr. Fauci repeatedly acknowledged the lack of visibility into experiments conducted at the Wuhan institute, saying, “None of us can know everything that’s going on in China, or in Wuhan, or what have you. And that’s the reason why — I say today, and I’ve said at the T.I.,” referring to his transcribed interview with the subcommittee, “I keep an open mind as to what the origin is.”

3 The Wuhan lab pursued this type of work under low biosafety conditions that could not have contained an airborne virus as infectious as SARS‑CoV‑2.

• Labs working with live viruses generally operate at one of four biosafety levels (known in ascending order of stringency as BSL-1, 2, 3 and 4) that describe the work practices that are considered sufficiently safe depending on the characteristics of each pathogen. The Wuhan institute’s scientists worked with SARS-like viruses under inappropriately low biosafety conditions .

In the United States, virologists generally use stricter Biosafety Level 3 protocols when working with SARS-like viruses.

Biosafety cabinets prevent

viral particles from escaping.

Viral particles

Personal respirators provide

a second layer of defense against breathing in the virus.

DIRECT CONTACT

Gloves prevent skin contact.

Disposable wraparound

gowns cover much of the rest of the body.

Personal respirators provide a second layer of defense against breathing in the virus.

Disposable wraparound gowns

cover much of the rest of the body.

Note: ​​Biosafety levels are not internationally standardized, and some countries use more permissive protocols than others.

The Wuhan lab had been regularly working with SARS-like viruses under Biosafety Level 2 conditions, which could not prevent a highly infectious virus like SARS-CoV-2 from escaping.

Some work is done in the open air, and masks are not required.

Less protective equipment provides more opportunities

for contamination.

Some work is done in the open air,

and masks are not required.

Less protective equipment provides more opportunities for contamination.

• In one experiment, Dr. Shi’s group genetically engineered an unexpectedly deadly SARS-like virus (not closely related to SARS‑CoV‑2) that exhibited a 10,000-fold increase in the quantity of virus in the lungs and brains of humanized mice . Wuhan institute scientists handled these live viruses at low biosafet y levels , including BSL-2.
• Even the much more stringent containment at BSL-3 cannot fully prevent SARS‑CoV‑2 from escaping . Two years into the pandemic, the virus infected a scientist in a BSL-3 laboratory in Taiwan, which was, at the time, a zero-Covid country. The scientist had been vaccinated and was tested only after losing the sense of smell. By then, more than 100 close contacts had been exposed. Human error is a source of exposure even at the highest biosafety levels , and the risks are much greater for scientists working with infectious pathogens at low biosafety.
• An early draft of the Defuse proposal stated that the Wuhan lab would do their virus work at BSL-2 to make it “highly cost-effective.” Dr. Baric added a note to the draft highlighting the importance of using BSL-3 to contain SARS-like viruses that could infect human cells, writing that “U.S. researchers will likely freak out.” Years later, after SARS‑CoV‑2 had killed millions, Dr. Baric wrote to Dr. Daszak : “I have no doubt that they followed state determined rules and did the work under BSL-2. Yes China has the right to set their own policy. You believe this was appropriate containment if you want but don’t expect me to believe it. Moreover, don’t insult my intelligence by trying to feed me this load of BS.”
• SARS‑CoV‑2 is a stealthy virus that transmits effectively through the air, causes a range of symptoms similar to those of other common respiratory diseases and can be spread by infected people before symptoms even appear. If the virus had escaped from a BSL-2 laboratory in 2019, the leak most likely would have gone undetected until too late.
• One alarming detail — leaked to The Wall Street Journal and confirmed by current and former U.S. government officials — is that scientists on Dr. Shi’s team fell ill with Covid-like symptoms in the fall of 2019 . One of the scientists had been named in the Defuse proposal as the person in charge of virus discovery work. The scientists denied having been sick .

4 The hypothesis that Covid-19 came from an animal at the Huanan Seafood Market in Wuhan is not supported by strong evidence.

• In December 2019, Chinese investigators assumed the outbreak had started at a centrally located market frequented by thousands of visitors daily. This bias in their search for early cases meant that cases unlinked to or located far away from the market would very likely have been missed. To make things worse, the Chinese authorities blocked the reporting of early cases not linked to the market and, claiming biosafety precautions, ordered the destruction of patient samples on January 3, 2020, making it nearly impossible to see the complete picture of the earliest Covid-19 cases. Information about dozens of early cases from November and December 2019 remains inaccessible.
• A pair of papers published in Science in 2022 made the best case for SARS‑CoV‑2 having emerged naturally from human-animal contact at the Wuhan market by focusing on a map of the early cases and asserting that the virus had jumped from animals into humans twice at the market in 2019. More recently, the two papers have been countered by other virologists and scientists who convincingly demonstrate that the available market evidence does not distinguish between a human superspreader event and a natural spillover at the market.
• Furthermore, the existing genetic and early case data show that all known Covid-19 cases probably stem from a single introduction of SARS‑CoV‑2 into people, and the outbreak at the Wuhan market probably happened after the virus had already been circulating in humans.

An analysis of SARS-CoV-2’s evolutionary tree shows how the virus evolved as it started to spread through humans.

SARS-COV-2 Viruses closest

to bat coronaviruses

more mutations

Source: Lv et al., Virus Evolution (2024) , as reproduced by Jesse Bloom

The viruses that infected people linked to the market were most likely not the earliest form of the virus that started the pandemic.

• Not a single infected animal has ever been confirmed at the market or in its supply chain. Without good evidence that the pandemic started at the Huanan Seafood Market, the fact that the virus emerged in Wuhan points squarely at its unique SARS-like virus laboratory.

5 Key evidence that would be expected if the virus had emerged from the wildlife trade is still missing.

In previous outbreaks of coronaviruses, scientists were able to demonstrate natural origin by collecting multiple pieces of evidence linking infected humans to infected animals.

Infected animals

Earliest known

cases exposed to

live animals

Antibody evidence

of animals and

animal traders having

been infected

Ancestral variants

of the virus found in

Documented trade

of host animals

between the area

where bats carry

closely related viruses

and the outbreak site

Infected animals found

Earliest known cases exposed to live animals

Antibody evidence of animals and animal

traders having been infected

Ancestral variants of the virus found in animals

Documented trade of host animals

between the area where bats carry closely

related viruses and the outbreak site

For SARS-CoV-2, these same key pieces of evidence are still missing , more than four years after the virus emerged.

For SARS-CoV-2, these same key pieces of evidence are still missing ,

more than four years after the virus emerged.

• Despite the intense search trained on the animal trade and people linked to the market, investigators have not reported finding any animals infected with SARS‑CoV‑2 that had not been infected by humans. Yet, infected animal sources and other connective pieces of evidence were found for the earlier SARS and MERS outbreaks as quickly as within a few days, despite the less advanced viral forensic technologies of two decades ago.
• Even though Wuhan is the home base of virus hunters with world-leading expertise in tracking novel SARS-like viruses, investigators have either failed to collect or report key evidence that would be expected if Covid-19 emerged from the wildlife trade . For example, investigators have not determined that the earliest known cases had exposure to intermediate host animals before falling ill. No antibody evidence shows that animal traders in Wuhan are regularly exposed to SARS-like viruses, as would be expected in such situations.
• With today’s technology, scientists can detect how respiratory viruses — including SARS, MERS and the flu — circulate in animals while making repeated attempts to jump across species . Thankfully, these variants usually fail to transmit well after crossing over to a new species and tend to die off after a small number of infections. In contrast, virologists and other scientists agree that SARS‑CoV‑2 required little to no adaptation to spread rapidly in humans and other animals . The virus appears to have succeeded in causing a pandemic upon its only detected jump into humans.

The pandemic could have been caused by any of hundreds of virus species, at any of tens of thousands of wildlife markets, in any of thousands of cities, and in any year. But it was a SARS-like coronavirus with a unique furin cleavage site that emerged in Wuhan, less than two years after scientists, sometimes working under inadequate biosafety conditions, proposed collecting and creating viruses of that same design.

While several natural spillover scenarios remain plausible, and we still don’t know enough about the full extent of virus research conducted at the Wuhan institute by Dr. Shi’s team and other researchers, a laboratory accident is the most parsimonious explanation of how the pandemic began.

Given what we now know, investigators should follow their strongest leads and subpoena all exchanges between the Wuhan scientists and their international partners, including unpublished research proposals, manuscripts, data and commercial orders. In particular, exchanges from 2018 and 2019 — the critical two years before the emergence of Covid-19 — are very likely to be illuminating (and require no cooperation from the Chinese government to acquire), yet they remain beyond the public’s view more than four years after the pandemic began.

Whether the pandemic started on a lab bench or in a market stall, it is undeniable that U.S. federal funding helped to build an unprecedented collection of SARS-like viruses at the Wuhan institute, as well as contributing to research that enhanced them . Advocates and funders of the institute’s research, including Dr. Fauci, should cooperate with the investigation to help identify and close the loopholes that allowed such dangerous work to occur. The world must not continue to bear the intolerable risks of research with the potential to cause pandemics .

A successful investigation of the pandemic’s root cause would have the power to break a decades-long scientific impasse on pathogen research safety, determining how governments will spend billions of dollars to prevent future pandemics. A credible investigation would also deter future acts of negligence and deceit by demonstrating that it is indeed possible to be held accountable for causing a viral pandemic. Last but not least, people of all nations need to see their leaders — and especially, their scientists — heading the charge to find out what caused this world-shaking event. Restoring public trust in science and government leadership requires it.

A thorough investigation by the U.S. government could unearth more evidence while spurring whistleblowers to find their courage and seek their moment of opportunity. It would also show the world that U.S. leaders and scientists are not afraid of what the truth behind the pandemic may be.

More on how the pandemic may have started

Where Did the Coronavirus Come From? What We Already Know Is Troubling.

Even if the coronavirus did not emerge from a lab, the groundwork for a potential disaster had been laid for years, and learning its lessons is essential to preventing others.

By Zeynep Tufekci

Why Does Bad Science on Covid’s Origin Get Hyped?

If the raccoon dog was a smoking gun, it fired blanks.

By David Wallace-Wells

A Plea for Making Virus Research Safer

A way forward for lab safety.

By Jesse Bloom

The Times is committed to publishing a diversity of letters to the editor. We’d like to hear what you think about this or any of our articles. Here are some tips . And here’s our email: [email protected] .

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Alina Chan ( @ayjchan ) is a molecular biologist at the Broad Institute of M.I.T. and Harvard, and a co-author of “ Viral : The Search for the Origin of Covid-19.” She was a member of the Pathogens Project , which the Bulletin of the Atomic Scientists organized to generate new thinking on responsible, high-risk pathogen research.

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