While myocarditis has been in the headlines lately due to rare occurrences in mRNA COVID-19 vaccine recipients, it’s viruses that are the most common cause of the condition in children, the American Heart Association (AHA) said.

While myocarditis has been in the headlines lately due to rare occurrences in mRNA COVID-19 vaccine recipients, it’s viruses that are the most common cause of the condition in children, the American Heart Association (AHA) said.