Millions of teens have now been vaccinated and there are less than a dozen with myocarditis. Needs to be looked at, but it does NOT mean they have myocarditis from the vaccination. It's a standard question that is asked of anyone who has a medical problem, have you been vaccinated?
It could be they have it just because of any other reason. Every year this is a far larger population of HS boys who upon required testing for sports have myocarditis, arrhythmias, and other heart conditions.
My teen sons wanted to get the vaccination as soon as possible. Kudos to them. Now, they have enlarged brains (according to them), but I've been dealing with that since they were 12-13. If I could vaccinate them for that, I would, but it's only cured by falling on their face a couple of times, looking and mom & dad, and having that epiphany that mom & dad were telling them the truth the entire time.