
A healthcare worker takes a sample at a New York State Department of Health COVID-19 antibody testing center at Steve's 9th Street Market in Brooklyn, New York, the United States, April 25, 2020. (Photo by Michael Nagle/Xinhua)

A healthcare worker takes a sample at a New York State Department of Health COVID-19 antibody testing center at Steve's 9th Street Market in Brooklyn, New York, the United States, April 25, 2020. (Photo by Michael Nagle/Xinhua)