Question

Joe Biden’s cancer is a form of “turbo cancer” caused by mRNA vaccines.

Answer 1

This is extremely false. Despite absolutely zero evidence to support this claim and an infinite amount to refute it, people still try and use it as a political “I told you so” about the covid vaccine. In fact an article done by the American Cancer Society states “There is no information that suggests that COVID-19 vaccines cause cancer. There is also no information that suggests these vaccines can make cancer grow or recur (come back).” Additionally, according to factcheck.org the conclusions that any Covid-19 mRNA vaccines could aid in cancer development is mainly “based on the misinterpretation of a study on mRNA cancer vaccines in mice.” So no, there is no truth to this claim and it is completely false. 

https://www.factcheck.org/misconceptions/distortions-of-science/

https://perma.cc/62YU-J3GV 

Comments

Your answer is very helpful and straight to the point. It was particularly effective in including the possible source of misconceptions about covid mRNA vaccines causing cancer. I think the only improvement that could be made would be mentioning any info you found on the account making the claim, such as potential bias, and how you determined she must be referring to the Covid-19 vaccines specifically.

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Great job checking the source and studies. I think that sometimes people get slightly emotional and start basing takes off of their own opinions. Keep up the good work

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I like how you chose a source that focused on the science behind it and factual evidence. Debunking this claim is quite easy, as we have scientific evidence such as this to draw upon, amidst the biased and false media we consume.

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Your response is very well supported! Claims linking COVID-19 vaccines to cancer have absolutely no ground to stand on and have been repeatedly debunked by credible medical and scientific organizations. The American Cancer Society and factcheck.org both confirm that there is no evidence the vaccines cause, worsen, or trigger cancer. As you pointed out, the rumors often stem from a misinterpretation of early mRNA research in mice, which is unrelated to the approved COVID-19 vaccines.

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Your response was easy to understand and you made your point clear in this check with very good sources to back up your claims. I like how this response flows and doesn't feel like a mesh of information and it's explained properly.

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Your response is very thorough and straight to the point. Using the American Cancer Society as a quote helped validate your point because they are an official source that can be trusted.

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I really like this answer as the structure of it makes it easy to understand. I like how you first and foremost point out that the information is absolutely not true. I then like how you give us the evidence as to why its false and include the links at the end to make your fact checks easily verifiable.

Answer 2

This claim is false, With a quick search on google, can you clearly tell this claim is based off social media remarks, and not scientific facts. This article by the Daily Herald does a good job expelling how the term, "Turbo Cancer" is simply something that was created on social media by people who don't necessarily support the Covid-19 vaccinations and are using Biden's cancer as a way to put blame on the vaccination. What I wasn't aware of, and found interesting about this article, is that Biden's cancer is at a level 9 out of 10 on the Gleason scale, showing just how severe his cancer really is. 

https://www.dailyherald.com/20250525/news/facts-matter-bidens-cancer-not-caused-by-vaccines/

Comments

This is a good response. Understanding how terms like these that are spread in social media, affect our consuming habits is really important. Media like this can be really harmful when drawing off just social media conspiracies and not facts.

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This is a good fact check and you used a source that is relevant and supports your point. Something that I think would make this fact check stronger is looking deeper into why vaccinations didn't cause Joe Biden's cancer and adding another source. However, I really like how you explained the term "turbo cancer" and added something that you found interesting from the article.

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I like this factcheck because it states why the type of cancer Joe has was apparently from the vaccine. The reason being that the term is something that was created online. I also feel Joe is a big celebrity so a lot about him could be very false. I would add one more article because I like two pieces of evidence when I am checking something.

Answer 3

This claim is false. The source here used to back up this claim is not scientifically proven and spread by word of mouth. Along with these complications, the source provided was produced by right-biased media, which is important to recognize. The term "turbo cancer" was developed by anti-vaccine individuals and nothing but a myth. Social media has surfaced false information regarding this claim, and many of them happen to be more conservative individuals who choose to reason Biden's cancer because of the mRNA vaccines.

https://globalvaccinedatanetwork.org/news/turbo_cancer_and_mrna_myth_that_defies_biology_and_physics

Comments

This is a very clear, concise, and accurate fact check. You have cited a very reputable source, one dedicated to combating vaccine misinformation and hosted by an academic institution. This site provides information on the effects of vaccines on cancers as well as challenges the claim of the existence of "Turbo Cancer", and acknowledges its origins as being from anti-vaccine circles.  I also appreciate your mentioning that the source of this claim comes from a right-wing media source, though I would suggest providing specific evidence of this claim as well, for example, how she refers to herself as being a "MAHA Mama".

Answer 4

The main claim is that Joe Biden has a form of aggressive cancer supposedly caused by mRNA vaccines, often referred to in conspiracy circles as “turbo cancer.” This claim is not verified by any medical professional or government source. “Turbo cancer” is not a real medical diagnosis. According to the National Cancer Institute, no such term is recognized in cancer literature or clinical practice. The post came from a personal Twitter account, @Nursekatejohn, not a professional news outlet. The account frequently posts anti-vaccine conspiracy content and has no institutional or scientific backing. The author of the post, “Nurse Kate John,” does not appear to have medical credentials listed publicly, and no verified LinkedIn profile or institutional affiliation could be found. The claims of being a nurse are unverified and could be part of a ploy to appear medically credible. The post is from April 2025, making it current. However, the underlying conspiracy about “turbo cancer” and vaccines has been circulating since 2022, often revived with new names or public figures. There are no real quotes or sources cited in the original post. Biden’s actual cancer diagnosis was publicly disclosed, and none of his physicians or oncologists have linked it to vaccines. Overall, the post is based on conspiracy theories, not medical science. No legitimate source, including Biden’s medical team, national cancer institutions, or major news organizations, supports this claim.

Sources: https://www.cancer.org/search.html?q=turbo+cancer

https://apnews.com/article/biden-cancer-prostate-be18c98abe341cd91277e1d3b75d5cd5

https://www.contagionlive.com/view/mrna-covid-19-vaccines-and-turbo-cancer-the-latest-myth-that-won-t-disappear

Comments

I think that this fact check was very well done. You provide relevant and respected sources to back up your information. I also like how you touched on the background of the initial post claiming that Biden's cancer was caused by vaccines. It is very helpful to know that the person who made the post is not a medical professional and that the account has other posts similar to this about anti-vaccine conspiracies. Overall, this was a very helpful fact check with good sources and it is clear that a lot of research was done.

Answer 5

This answer is entirely false. To begin, there is literally NO evidence to prove that any link between mRNA vaccines and cancers exist. However, according to the Global Data Vaccine Network, there is a lot of contradictory evidence. Moreover, the Global Data Vaccine Network describes this as a new conspiracy theory, arguing that the prevalence of the myth is connected with other vaccine disinformation. This has been thoroughly debunked. 

Answer 6

The claim that Joe Biden has a sort of "turbo cancer" caused by mRNA Covid-19 vaccines is false. It has been proven by various different credible scientific organizations that there is no correlation between whether someone has taken a Covid shot and whether they have cancer. Some of these organizations who have disproven this myth include the American Cancer Society as well as National Institute of Health (NIH). I have also found a source on a website called contagion live written by Jessica Malaty Rivera, MS, which acknowledges several different common psychological terms that are commonly underlying in the mentality of those who create these myths.

https://pmc.ncbi.nlm.nih.gov/articles/PMC8556679/

https://www.cancer.org/cancer/managing-cancer/coronavirus-covid-19-and-cancer/covid-19-vaccines-in-people-with-cancer.html

https://www.contagionlive.com/view/mrna-covid-19-vaccines-and-turbo-cancer-the-latest-myth-that-won-t-disappear

Answer 7

This is a false claim. I say that simply because there is no scientific evidence that mRNA vaccines cause cancer. Also, this claim has no sources except for posts on "X" or what was formally known as Twitter. When looking up connections between cancer and mRNA vaccines, I found multiple sources that explain why this is a false claim. An article in the Daily Herald titled, "Facts Matter: Biden's Cancer Not Caused by Vaccines," mentions how after Biden's diagnosis, social media users began speculating that his cancer was caused by Covid-19 vaccines. However, the article mentions how these claims are false and uses Politifact as a reference using the quote from a molecular biologist that, "in order to cause cancer, something has to damage DNA or cause chronic damage that leads to more mistakes in DNA replication. Neither mRNA nor the spike protein it produces have any capability to mutate DNA.” When looking that the article in Politifact, it is mentioned that, " cancer rates have not increased in an unexpected way, which you would definitely expect to see if the mass rollout of a cancer-causing vaccine just happened." This affirms the fact that there has been no evidence that vaccines cause cancer as there have been no affect on cancer rates following the distribution of Covid vaccines. When looking at information from the Global Vaccine Data Network, vaccines are actually, "one of the most successful tools in preventing virus-related cancers." Looking into the mRNA vaccine specifically, the Global Vaccine Data Network states that mRNA vaccines don't, "contain live virus or long-lived genetic material capable of altering cellular DNA. Thus, there is no plausible mechanism by which mRNA vaccines could cause cancer." After looking at these sources, there is no scientific evidence that Biden's cancer was cause by mRNA vaccines as claimed on social media. 

https://www.dailyherald.com/20250525/news/facts-matter-bidens-cancer-not-caused-by-vaccines/ 

https://www.politifact.com/factchecks/2025/may/20/tweets/Biden-turbo-cancer-vaccine-covid-mrna/ 

https://globalvaccinedatanetwork.org/news/turbo_cancer_and_mrna_myth_that_defies_biology_and_physics 

Answer 8

This claim is entirely false. "Turbo cancer" is not a recognized medical term and has no research basis. An article from PolitiFact debunks this exact social media post, explaining that there is no evidence linking mRNA vaccines to causing or accelerating cancer. Though scientists confirm that Biden's form of cancer is aggressive, it is following a regular progression and the term "Turbo Cancer" is not real.

https://www.politifact.com/factchecks/2025/may/20/tweets/Biden-turbo-cancer-vaccine-covid-mrna/