A resident takes the nucleic acid test at a testing post set up at a plaza in Wuhan, central China's Hubei Province, May 15, 2020. Wuhan will arrange nucleic acid tests for all residents who have not been tested before, in order to better know the number of asymptomatic cases of the novel coronavirus. The decision was made as the virus-ravaged city continued to report daily increases of asymptomatic infections, which raised concerns among the public. (Xinhua/Xiao Yijiu)
