COVID-19 was in US weeks earlier than previously known: Study
A study has suggested that coronavirus infections may have been present in the US in December 2019, much before the first American case emerged on January 19. The study has identified 106 COVID-19 infections from 7,389 blood samples collected from donors between December 13 and January 17. The study also suggests that COVID-19 was silently circulating worldwide earlier than known.