My question is: Did things of this nature (young people collapsing/dying while in engaged in a demanding physical activity or sporting event) happen prior to the vax but was not widely publicized because it was an extremely rare event?
Or, since the vax, has the number of young people dying in these incidents increased dramatically which might be an argument that there is a “cause and effect” between the vax and young people dying?
The latter.
Here are some answers of deaths by age group over years. It appears the premature death rate has been on a steady rise, some of which predates the vax. I only spent a few minutes looking at the graphs, it appears there are more causes for the increasing rate than just the vax.