Local residents queue for COVID-19 nucleic acid tests in Changsha, central China's Hunan Province, March 22, 2022. (Xinhua/Chen Zhenhai)
A medical worker takes a swab sample from a resident for COVID-19 nucleic acid test in Changsha, central China's Hunan Province, March 22, 2022. (Xinhua/Chen Zhenhai)
A medical worker takes a swab sample from a resident for COVID-19 nucleic acid test in Changsha, central China's Hunan Province, March 22, 2022. (Xinhua/Chen Zhenhai)
A medical worker takes a swab sample from a resident for COVID-19 nucleic acid test in Yueshan Village of Huangcai Town in Ningxiang City, Changsha, central China's Hunan Province, March 22, 2022. (Xinhua)
