A medical worker takes a swab sample from a child for COVID-19 nucleic acid testing in Qingdao, East China's Shandong province, March 22, 2022. [Photo/Xinhua]
A medical worker takes a swab sample from a resident for COVID-19 nucleic acid testing in Qingdao, East China's Shandong province, March 22, 2022. [Photo/Xinhua]
People queue up to take COVID-19 nucleic acid tests in Qingdao, East China's Shandong province, March 22, 2022. [Photo/Xinhua]
A medical worker takes a swab sample from a resident for COVID-19 nucleic acid testing in Qingdao, East China's Shandong province, March 22, 2022. [Photo/Xinhua]
