Nearly 1 million children across the United States have been infected with COVID-19 since the pandemic began, according to a new report by The American Academy of Pediatrics and the Children’s Hospital Association. Using publicly available data from 49 states, New York City, Washington, D.C., Puerto Rico, and Guam, the organizations found that 927,518 children — or 11.3% of all cases nationwide — had been infected as of November 5.

Nearly 74,000 new cases were reported among children in the first week of November alone, the data show, the highest weekly increase since the pandemic began. Cases among children rose 17% during the two weeks leading up to Nov. 5. The report also finds that up to 6.4% of pediatric COVID-19 cases result in severe illness and hospitalization.

Fewer than 1% of pediatric COVID-19 cases result in death, according to the numbers, but as more children become infected, doctors and researchers must track the long-term physical and mental health impacts of the disease.