Advertisement1st Known U.S. COVID-19 Death Was Weeks Earlier Than Previously ThoughtApril 22, 2020Bill ChappellfacebookEmailMedical students, faculty and volunteers take blood samples during a coronavirus antibody study in Mountain View, Calif., on April 3. Santa Clara County's medical examiner says a person who died on Feb. 6 has posthumously tested positive for COVID-19. (The Mercury News via Getty Images)