Created at	Source	Raw Value	Validated value
Nov. 16, 2021, 6:30 p.m.	usa	inclusion criteria: age between 18 and 60 years. health care worker in the front line of care of suspected or confirmed cases of covid-19. negative igm antibodies.	inclusion criteria: age between 18 and 60 years. health care worker in the front line of care of suspected or confirmed cases of covid-19. negative igm antibodies.
Oct. 26, 2020, 11:31 p.m.	usa	inclusion criteria: 1. age between 18 and 60 years. 2. health care worker in the front line of care of suspected or confirmed cases of covid-19. 3. negative igm antibodies.	inclusion criteria: 1. age between 18 and 60 years. 2. health care worker in the front line of care of suspected or confirmed cases of covid-19. 3. negative igm antibodies.