[EEGator]

That young could very well be a defect of some sort.
Maybe they’ll say more later.

[nitzy]

I have seen a lot of news articles in the past year that offer many different possible causes for heart attacks in young children...

defects
allergies
video games
stress at school
bad sleep patterns

None of the news articles mentioned any new widespread experimental medical treatment though.

[TangoLimaSierra]

That young could very well be a defect of some sort.

Considering how old his dad is, that is quite possible.

My money is still on the vax.

[9YearLurker]

Most likely a defect that entered via his upper arm.