TOPSHOT - A medical worker takes a swab sample from a woman to be tested for the COVID-19 coronavirus while people wait in a line for testing next to a shopping mall in Wuhan, in China's central Hubei province on May 16, 2020. - Nervous residents of China's pandemic epicentre of Wuhan queued up across the city to be tested for the coronavirus beginning on May 14 after a new cluster of cases sparked a mass screening campaign. (Photo by Hector RETAMAL / AFP)