Illinois, Oct. 2 -- Children and adolescents were twice as likely to experience long Covid after contracting Covid for the second time, compared to their peers with a single previous infection.

These results run counter to the popular perception that Covid in children is "mild" and that reinfections with Covid do not carry the same risk of long Covid as initial infections.

Among the conditions associated with long Covid in youth, myocarditis (swelling of the heart muscle that can weaken the heart and even prove fatal) was most common, with the risk tripling after a second Covid infection compared to the initial infection. Blood clots in children were more than twice as likely after a second Covid infection. Kids were also at increased r...