Created at	Source	Raw Value	Validated value
Dec. 11, 2020, 12:31 a.m.	usa	Compare the cumulative incidence of severe forms of COVID-19;Assess the BCG vaccine-mediated immune response in health care workers;Compare the cumulative incidence of SARS-CoV-2 infection	Compare the cumulative incidence of severe forms of COVID-19;Assess the BCG vaccine-mediated immune response in health care workers;Compare the cumulative incidence of SARS-CoV-2 infection