> Previous research co-authored by Balicer found that in this age group, becoming infected with SARS-CoV-2 made a person 18 times more likely to develop myocarditis — a much more significant risk than is observed following vaccination.
Sources are in the article. You can easily find sources for COVID, please try searching it yourself first.
"Healthy boys may be more likely to be admitted to hospital with a rare side-effect of the Pfizer/BioNTech Covid vaccine that causes inflammation of the heart than with Covid itself, US researchers claim."
https://www.theguardian.com/world/2021/sep/10/boys-more-at-r...
Anecdata from another thread: https://news.ycombinator.com/item?id=29122896
> Across all ages, the risk of myocarditis was almost 16 times higher for people with COVID-19 compared to those who aren’t infected. The myocarditis risk is 37 times higher for infected children under 16 years and seven times higher for infected people ages 16-39 compared to their uninfected peers.
> My understanding is that the incidence of myocarditis is much higher in a COVID infection than from any of the vaccines.