Recently in JAMA Pediatrics, researchers reviewed 32 studies worldwide comprising 41,640 children and adolescents under the age of 20, as well as 268,945 adults. The analysis also included 18 studies, including three based in schools, in which scientists had traced the contacts of infected individuals.
The analysis found — like the new C.D.C. study — that younger children are roughly half as likely as adults to become infected, and that children older than 14 may be just as likely as adults to be infected. Antibody studies also suggested that adolescents seemed to be similar to adults in terms of their risk of infection.
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Experts praised the scientists for trying to make sense of studies that vary widely in methods, in cultural milieu and even in how they defined children —