According to the Centers for Disease Control and Prevention (CDC), about 2,000 young, seemingly healthy people under age 25 in the United States die each year of sudden cardiac arrest even before covid.
Even this article from 2012 is trying to figure out why healthy people under 18 have undetermined sudden deaths.
https://www.washingtonpost.com/nati...e-unexpectedly/2012/07/30/gJQApjNxKX_story.ht
There are many documented cases of athletes over and under 18 collapsing before 2019.
I would imsgine that there is a current study underway comparing these cases with pre vaccine cases.
As many are prone to point out, data takes time to compile and analyse so don't hold your breath for anything pending.
I remember long ago, before the internet, during high school, there were 2 sudden deaths of students during sports at my school, one during a basketball game from a cardiac arrest and the other due to some kind of brain embolism during a volleyball game.
There was also a heart attack in a football player from another school but I am pretty sure he survived.
Seems sudden death in young people is rare but not unprecedented.
"Perhaps 1 in every 50,000 sudden cardiac deaths a year occurs in young athletes"
This article was written Jan 2019.
https://www.mayoclinic.org/diseases...iac-arrest/in-depth/sudden-death/art-20047571