Created at	Source	Raw Value	Validated value
May 22, 2021, 12:32 a.m.	usa	Incidence of SARS-CoV-2 infection in the control group.;Incidence of SARS-CoV-2 infection in the experimental group.	Incidence of SARS-CoV-2 infection in the control group.;Incidence of SARS-CoV-2 infection in the experimental group.