Children who get COVID-19 more than once are at higher risk of developing long COVID, new research from the University of Pennsylvania suggests.

Specifically, the study published Tuesday in The Lancet Infectious Diseases found that children who get COVID twice are two times more likely to develop long COVID compared to children who only get COVID once. MORE: Philly's recovery housing complex now offers residents on-site addiction treatment medications

"Many had hoped reinfections of COVID would be milder or carry less long-term risk, but we found increased risks for a broad range of conditions, challenging the assumptions many had that children bounce back quickly," said Bingyu Zhang, a researcher at the Penn Computing, Inference and Learning lab.

A lack of a universal definit

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