The news about a potential link between the Covid-19 vaccine and a cardiac ailment in young people may be striking fear in the hearts of some parents. But pediatric cardiologists have a message for these parents: Covid-19 should scare you more — a whole lot more — than the vaccine. And these doctors should know. They’ve treated young patients who’ve contracted this heart ailment after vaccination — it’s called myocarditis, or inflammation of the heart muscle — and they’ve also treated young patients who’ve had Covid-19. There simply is no comparison between the two, they say.