A medical worker takes a swab sample from a citizen for nucleic acid test at a testing site in Shibei District of Qingdao, east China's Shandong Province, March 13, 2022. Qingdao reported 150 locally transmitted COVID-19 cases, and 78 asymptomatic carriers on Saturday. (Xinhua/Li Ziheng)
Medical workers take swab samples from citizens for nucleic acid tests at a testing site in Shibei District of Qingdao, east China's Shandong Province, March 13, 2022. Qingdao reported 150 locally transmitted COVID-19 cases, and 78 asymptomatic carriers on Saturday. (Xinhua/Li Ziheng)
Citizens queue for nucleic acid tests at a testing site in Shibei District of Qingdao, east China's Shandong Province, March 13, 2022. Qingdao reported 150 locally transmitted COVID-19 cases, and 78 asymptomatic carriers on Saturday. (Xinhua/Li Ziheng)
