The smallpox vaccine causes roughly comparable rates of myocarditis, but that didn’t stop us from undertaking a worldwide vaccination campaign to eradicate the disease.
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If there were like 100x more common serious side effects, we should maybe have a conversation about whether certain populations with low Covid risk or heightened vaccine risk should pick which vaccine to take based on potential side effects. But we are so far away from that kind of risk that it is hard to see the commentary from the anti-vax side as any kind of good faith conversation, compared to grasping at whatever straws they can find to spread FUD.
The basic summary is: these vaccines are extremely safe and extremely effective for people of every age. Please everyone get vaccinated. If you have had 2 doses >4 months ago, get boosted. Anyone who tells you that the vaccine is unsafe compared to catching Covid is either grossly misinformed or lying.
By comparison, (a) these vaccines have directly saved millions of lives (including saving at least tens of thousands of lives of healthy young men), and (b) infection by Covid-19 itself causes myocarditis at much higher rates.
It is likely that these vaccines have in fact prevented more instances of severe myocarditis than they have caused, without considering the large constellation of other dangerous chronic or fatal effects of Covid-19.
The risk/benefit calculations are stark here (in favor of universal vaccination, including for 15–25 year old men), and from what I can tell there is no evidence that the vaccines put children at nontrivial risk.