A medical worker takes a swab sample from a resident for COVID-19 test at a testing site in Gulou District of Nanjing, east China's Jiangsu Province, July 22, 2021. Nanjing launched an all-inclusive nucleic acid testing campaign Wednesday. (Xinhua/Li Bo)
China's Nanjing launches citywide nucleic acid testing after airport COVID-19 infections
Source: Xinhua| 2021-07-22 11:14:31|Editor: huaxia