There has been an uptick in the number of children hospitalized with COVID-19 in the US, raising concerns as youngsters return to classrooms Monday following a weeklong holiday break. From Dec 16 to Dec 23, almost 199,000 children in the US tested positive for the coronavirus, a 50 percent increase over the weekly new cases at the beginning of December, according to a report from the American Academy of Pediatrics and the Children's Hospital Association released on Dec 23. The average nu...