WASHINGTON, DC, United States (AFP) - Almost 280,000 school-aged children were infected with the novel coronavirus between March 1 and September 19, according to detailed data released in a report by the US Centers for Disease Control and Prevention (CDC), yesterday.The figure accounted for roughly four per cent of the total US caseload over this period, with children aged 12-17 approximately twice as likely to be infected as those aged 5-11.