Those blood tests showed that 1,887 of them had antibodies to the novel coronavirus, meaning they had been infected in the past. After statistical adjustment and extrapolation, the researchers estimated that more than 2 million New York adults had been infected by the end of March. The study also shows that communities of color were disproportionately affected by Covid-19. The study was posted on the pre-print server MedRXiv.org, which means it wasn't peer reviewed or published in a medical journal. Questions about immunity after infectionFor the New York study, the researchers used an antibody test designed by the Wadsworth Center, a laboratory at the state health department.

Source: CNN May 29, 2020 23:26 UTC