Health workers are seen at a drive-through COVID-19 testing location set up by the Virginia Hospital Center in Arlington, Virginia, the United States, on March 19, 2020. The number of COVID-19 cases in the United States topped 13,000 as of 5:30 p.m. local time on Thursday (2130 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Photo by Ting Shen/Xinhua)
