Incidence of Covid-19 by Time Period

Source: Baden, L.R., H.M. El Sahly, B. Essink, et al. (2021). Efficacy of the mRNA-1273 SARS-CoV-2 Vaccine at Completion of Blinded Phase. N Engl J Med, 384:1774-85. DOI: 10.1056/NEJMoa2113017