“…The wide ranges in estimates were likely related to differences in settings, exposures, community transmission rates, symptom status, use of infection control measures, and other factors. Rates of SARS-CoV-2 infection based on polymerase chain reaction positivity, reported in 4 new studies, ranged from 0% to 9.9% ( 3 , 4 , 9 , 10 ). Severe acute respiratory syndrome coronavirus 2 seropositivity, reported in 5 new studies, ranged from 3.2% to 13.2% ( 4–6 , 8 , 10 ).…”