So is the hit as the TRUE cause, that is speculation also. But since it HAS NEVER HAPPENED before, in many other sports as well, Occam’s razor absolutely applies here. The Vax cannot be ruled out...
Did all the other young healthy athletes in other sports take hits? There is a real world pattern here that cannot be ignored... It appears to always happen when adrenaline spikes.
Re: 121 - these sorts of events have happened before.