(AP)  After preying heavily on the elderly in the spring, the coronavirus is infecting a rising number of American children and teens in a trend authorities say appears driven by school reopenings and the resumption of sports, playdates and other activities. An American Academy of Pediatrics report released Tuesday shows children of all ages now make up 10% of all U.S cases, up from 2% in April. And a new government report says cases in school-age children began rising in September.