A medical worker takes a swab sample from a citizen at a COVID-19 nucleic acid testing site in Yunlong Township of Haikou, south China's Hainan Province, Aug. 11, 2021. Yunlong launched its third round of mass nucleic acid testing on Wednesday. (Xinhua/Yang Guanyu)
People line up for COVID-19 nucleic acid tests at a COVID-19 nucleic acid testing site in Yunlong Township of Haikou, south China's Hainan Province, Aug. 11, 2021. Yunlong launched its third round of mass nucleic acid testing on Wednesday. (Xinhua/Yang Guanyu)
A medical worker takes a swab sample from a citizen at a COVID-19 nucleic acid testing site in Yunlong Township of Haikou, south China's Hainan Province, Aug. 11, 2021. Yunlong launched its third round of mass nucleic acid testing on Wednesday. (Xinhua/Yang Guanyu)
A medical worker takes a swab sample from a child at a COVID-19 nucleic acid testing site in Yunlong Township of Haikou, south China's Hainan Province, Aug. 11, 2021. Yunlong launched its third round of mass nucleic acid testing on Wednesday. (Xinhua/Yang Guanyu)
A medical worker takes a swab sample from a child at a COVID-19 nucleic acid testing site in Yunlong Township of Haikou, south China's Hainan Province, Aug. 11, 2021. Yunlong launched its third round of mass nucleic acid testing on Wednesday. (Xinhua/Yang Guanyu)
