Covid cases remain lowest among younger children, even after schools reopened, study says

(CNN)A new report from the US Centers for Disease Control and Prevention found that Covid-19 cases among younger children remained low even after schools restarted for in-person learning. To safely reopen schools, however, transmission in communities must be kept in check.

The report, published Wednesday in the CDC's Morbidity and Mortality Weekly Report, considered more than 2.8 million laboratory-confirmed Covid-19 cases in people ages zero to 24 from March 1 through December 12. More than 57% of those cases occurred among people ages 18 to 24. Cases among children and teens paralleled cases among adults through the summer and fall -- including spikes in cases in early summer followed by a decline, and then a steep increase in October through December.
    By early December, 62% of US K-12 school districts had opened for full or partial in-person learning. Despite that, reports of school outbreaks were "limited," CDC researchers wrote. Covid-19 incidence among the general population was similar in counties with in-person learning -- 401.2 cases per 100,000 people -- and those that were online only -- 418.2 per 100,000 people.