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Comment by wusher | Hacker News Reader

I don't have the numbers to answer this but which groups are getting myocarditis also matters. If covid causes myocarditis in 1 out of 100 people in an age group prone to myocarditis, but mRNA causes myocarditis in 15 out of 1000 people in an age group that doesn't get myocarditis, then then we should be very concerned about the mRNA myocarditis and adjust our policies accordingly.

Again, I made up those numbers and I'm not saying mRNA is worse. My point is that we should take a more nuanced and honest view than "they both cause it" or even "X has a great rate; therefore Y is better"

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Prior reports have done this examination

https://www.nature.com/articles/s41591-021-01630-0

> the increased risk of myocarditis after vaccination was higher in persons aged under 40 years. We estimated extra myocarditis events to be between 1 and 10 per million persons in the month following vaccination, which was substantially lower than the 40 extra events per million persons observed following SARS-CoV-2 infection.

https://www.medrxiv.org/content/10.1101/2021.12.23.21268276v...

> Despite more myocarditis events occurring in older persons, the risk following COVID-19 vaccination was largely restricted to younger males aged less than 40 years, where the risks of myocarditis following vaccination and infection were similar. However, the notable exception was that in younger males receiving a second dose of mRNA-1273 vaccine, the risk of myocarditis was higher following vaccination than infection, with an additional 101 events estimated following a second dose of mRNA-1273 vaccine compared to 7 events following a positive SARS-CoV-2 test.

mRNA-1273 is the Moderna vaccine. As your quotation notes, that same age group shows no significant difference in myocarditis risk following infection versus following the Pfizer vaccine. https://www.medrxiv.org/content/medrxiv/early/2021/12/25/202...

Currently, worldwide is still at "promoting vaccines at all cost because Covid is worse than Black Death". So doubt these research results would be freely allowed to get published or supported. China now only doing trials on mRNA (many countries stopped using their non-mRNA vaccines). India hasn't fully vaccinated their people yet. Large part of Africa is even worst situation. So at least 2-3 billions people havn't exposed fully to mRNA benefits or negative effects. Take dengue vaccine that was shelved in Philipines which requires multi years to see its side effects. We are now just entering year 2 or mRNA. Give it 10 years to know "acceptably" mRNA vaccine increases unnecessary risks of heart-related problems. If you know personally doctors working in vaccines research field you probably will know the negatives better. Many doctors scared to even mentioned these negatives for fear of retaliations (this is worlwide phenomena right now). There is a reason FDA needs 75 years to disclose mRNA vaccine related papers. There is also a reason why all statistics on negatives effect of vaccines is so few. Try mention any of those on Youtube or Facebook now and you'll almost instantly get retaliation as anti-vaxxers.

They're very likely to be causing myocarditis through the same mechanism involving the spike protein, which means your scenario is unlikely. Myocarditis prevalence among college athletes who have recovered from a COVID-19 infection (even asymptomatic) is so high that some conferences require comprehensive cardiac testing before they can return to play. https://www.thecardiologyadvisor.com/general-cardiology/hear...

Exercising while infected is known to increase risk. If you get the vaccine, you will be told not to exert yourself for some time after. If you get infected, you might have no idea that you should stop exercising unless and until you're symptomatic. https://www.bvhealthsystem.org/expert-health-articles/covid-...

I was not told to not exert myself when I got my 2 doses. I was however told that if I experienced any negative symptoms, just nap through it essentially.

I don't disagree with that nuance, I was just trying to get ahead of the inevitable anti-vaccine propagandists that will use this study out of context for their own narrative.

"Conclusions Men are significantly more susceptible to myocarditis than women. Young men are especially at risk for acquiring myocarditis, while women are affected most commonly at the postmenopausal age. The proportion of hospital admissions caused by myocarditis has an inverse, logarithmic association with age."

from : https://heart.bmj.com/content/99/22/1681

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