Does COVID Cause Cancer?

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Published 2024-05-07
There's a troubling link between COVID and certain cancers, but as always, it's complicated.

Hosted by: Hank Green (he/him)
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#SciShow #science #education #learning #complexly
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Sources:
www.ncbi.nlm.nih.gov/pmc/articles/PMC10202899/
www.ncbi.nlm.nih.gov/pmc/articles/PMC9361571/
onlinelibrary.wiley.com/doi/pdfdirect/10.1002/jmv.…
www.ncbi.nlm.nih.gov/pmc/articles/PMC8818950/

Images:
www.gettyimages.com/
commons.wikimedia.org/wiki/File:HepC_replication.p…
www.mdpi.com/1999-4915/15/12/2377
www.mdpi.com/1999-4915/15/12/2377
www.mdpi.com/2072-6694/15/13/3399
commons.wikimedia.org/wiki/File:Renin-angiotensin-…

All Comments (21)
  • We need to make this vid go viral just for the importance of that intro alone.
  • @petersmythe6462
    "it's only been out there in the world for 4 years" That won't stop job postings from requiring minimum 15 years of COVID treatment experience.
  • @tashokukisune
    C.mon, man… :( Covid already gave me permanent lung scarring, vascular damage, renal damage, and neurological damage (my smell never came back and it’s been four years), but also kicked off an autoimmune disorder that attacked my pancreas and made me pre-diabetic. It has taken so much from me. I used to be an RN. I was on the front lines.
  • @Psycomega1
    This video's entire introduction is basically just a cocktail of critical thinking, media literacy, and self aware admission of being flawed beings. Outstanding move.
  • Whoever first said, whatever doesn’t kill you makes you stronger, did not understand biology.
  • As a physician, I commend you in your scientific communication to the public. You actually explained how viruses can push us closer to cancers better than any explanation I received or read about in medical school, residency, fellowship, and in my career. Please continue your good work!
  • As someone who has been taking introductory courses in epidemiology, I do have one small correction for 5:14. (I don’t have a lot of knowledge yet, so take my correction lightly). An odds ratio of 2.9 can be interpreted as “people who have SARS-Cov-2 infection have 2.9 times the odds of having stomach cancer compared to those who were uninfected.” In epidemiology, an odds ratio of 1-1.9 is considered weak to no correlation. An odds ratio of 2-3.9 is considered strong correlation, but with more studies needed for confirmation. That is where this study lies. An odds ratio of 4 or more is considered very strong evidence of a correlation. You were correct that we should treat the conclusion of the study with measured caution and wait for more data, though it does indicate a strong correlation. Your point that an odds ratio of 2.9 is not strong because cancer-lung odds ratios are 8 at their weakest, however, is a bit exaggerated. Smoking is really weird as far as odds ratios goes. I have never seen any numbers higher in my coursework than those from studies on the effect of smoking. I encountered an odds ratio of 34 from one old study on smoking in my homework. That is just a ridiculously high odds ratio. Most correlations will never see an odds ratio higher than 5. Saying that 2.9 is a small odds ratio because the odds ratio between smoking and lung cancer is 8 is like saying 6 feet tall is short because Shaquille O’Neal is 7 feet tall. Hope that helps!
  • @jnee
    It's impossible to confirm retroactively but I was diagnosed with Aplastic Anaemia in 2020. AA is known to be triggered by viral infections and while it doesn't fall under the cancer umbrella it is treated quite similarly to various blood cancers.
  • @collin4555
    "But, fewer of you would have clicked on that, so we're doing what we're doing" I appreciate the acknowledgement that I still would have been just as intrigued by that
  • @zivzulander
    This is how you know an explainer is well-researched: when the answer is nuanced and caveated, not just trying to confirm the bias or to meet the expectations of anyone.
  • My family was looking after 2 small dogs when we contracted covid. The dogs were very concerned about us, sniffing our breath and doing their best to comfort us and not be a bother. I'd never seen them react that way to someone being ill before, so they must have known it was something serious.
  • @datorxodar4595
    Thank Dupont peddling Teflon and C8 containing cookware for the increase in colorectal cancers since the 80's. The fact that it is still legal absolutely baffles me.
  • @NirrumTheMad
    "imagine the most carcinogenic thing you can" me: Like what, drinking a bottle of benzene? That shit's like, liquid cancer. "I hope you're imagining smoking a cigarette" Eh close enough
  • @waxwinged_hound
    That's actually really comforting to know, that things don't exactly cause cancers (other than the body itself) but rather, increase the risk. That's a way of approaching it that I hadn't considered. I've had covid at least once, probably twice and I do have some symptoms of long covid, and seeing the title of this video made me think "great, as if I didn't have enough to worry about" but I clicked anyway. It's a scishow video, I trust you guys, and I figured the more information I have, the better. Also, I'm going to try and start referring to "cancer" as "cancers" since that's more accurate, thank you for making me aware of this.
  • @ritamen8425
    It would be so amazing if you would do a cancer series. I have Brain cancer, and it’s so hard sometimes to not get sucked in by the snake oils!
  • @Sijman
    Hank, the writer(s) for this episode need a raise. This is one of the best written scripts that I have seen from all of your channels in the last 5 years.
  • As a scientist who researches subjects in this field I appreciate your ability to communicate this better than us! Keep it up
  • @blabo6427
    I was in a coma for three weeks plus a month in recovery due to COVID four years ago. This video just added a new existential fear to me
  • @gray7433
    4 years definitely feels low... Like are we not all experiencing time shenanigans where it feels like 2020 was a decade ago but also that 2014 was yesterday? Glad to see you hosting again Hank.
  • so he established that ppl who get mild infections tend to bounce back, but what if ppl get mild infections multiple times? does that reduce their odds of bouncing back as well?