Fig. 1

New positive SARS-CoV-2 cases at SSD schools. Shown are number of new positive SARS-CoV-2 cases detected by study weekly screening tests (gray) and new positive SARS-CoV-2 cases detected outside the study through diagnostic testing (black)
New positive SARS-CoV-2 cases at SSD schools. Shown are number of new positive SARS-CoV-2 cases detected by study weekly screening tests (gray) and new positive SARS-CoV-2 cases detected outside the study through diagnostic testing (black)