A medical worker collects nucleic acid sample at a testing site in Yuhua District of Shijiazhuang, north China's Hebei Province, Jan. 25, 2021. Citizens at quarantine sites and those at areas designated as medium or high-risk for COVID-19 in Shijiazhuang need to receive nucleic acid tests every 48 hours starting from Monday. (Xinhua/Jin Haoyuan)
A medical worker collects nucleic acid sample at a testing site in Yuhua District of Shijiazhuang, north China's Hebei Province, Jan. 25, 2021. Citizens at quarantine sites and those at areas designated as medium or high-risk for COVID-19 in Shijiazhuang need to receive nucleic acid tests every 48 hours starting from Monday. (Xinhua/Zhu Xudong)
A medical worker collects nucleic acid sample at a testing site in Yuhua District of Shijiazhuang, north China's Hebei Province, Jan. 25, 2021. Citizens at quarantine sites and those at areas designated as medium or high-risk for COVID-19 in Shijiazhuang need to receive nucleic acid tests every 48 hours starting from Monday. (Xinhua/Jin Haoyuan)
A medical worker collects personal information of a resident for nucleic acid testing in Yuhua District of Shijiazhuang, north China's Hebei Province, Jan. 25, 2021. Citizens at quarantine sites and those at areas designated as medium or high-risk for COVID-19 in Shijiazhuang need to receive nucleic acid tests every 48 hours starting from Monday. (Xinhua/Zhu Xudong)
A medical worker collects nucleic acid sample at a testing site in Yuhua District of Shijiazhuang, north China's Hebei Province, Jan. 25, 2021. Citizens at quarantine sites and those at areas designated as medium or high-risk for COVID-19 in Shijiazhuang need to receive nucleic acid tests every 48 hours starting from Monday. (Xinhua/Zhu Xudong)
A medical worker collects nucleic acid sample at a testing site in Yuhua District of Shijiazhuang, north China's Hebei Province, Jan. 25, 2021. Citizens at quarantine sites and those at areas designated as medium or high-risk for COVID-19 in Shijiazhuang need to receive nucleic acid tests every 48 hours starting from Monday. (Xinhua/Zhu Xudong)
A medical worker collects nucleic acid sample at a testing site in Yuhua District of Shijiazhuang, north China's Hebei Province, Jan. 25, 2021. Citizens at quarantine sites and those at areas designated as medium or high-risk for COVID-19 in Shijiazhuang need to receive nucleic acid tests every 48 hours starting from Monday. (Xinhua/Jin Haoyuan)
A medical worker collects personal information of a resident for nucleic acid testing in Yuhua District of Shijiazhuang, north China's Hebei Province, Jan. 25, 2021. Citizens at quarantine sites and those at areas designated as medium or high-risk for COVID-19 in Shijiazhuang need to receive nucleic acid tests every 48 hours starting from Monday. (Xinhua/Jin Haoyuan)
A medical worker collects nucleic acid sample at a testing site in Yuhua District of Shijiazhuang, north China's Hebei Province, Jan. 25, 2021. Citizens at quarantine sites and those at areas designated as medium or high-risk for COVID-19 in Shijiazhuang need to receive nucleic acid tests every 48 hours starting from Monday. (Xinhua/Zhu Xudong)
A medical worker collects nucleic acid sample at a testing site in Yuhua District of Shijiazhuang, north China's Hebei Province, Jan. 25, 2021. Citizens at quarantine sites and those at areas designated as medium or high-risk for COVID-19 in Shijiazhuang need to receive nucleic acid tests every 48 hours starting from Monday. (Xinhua/Zhu Xudong)
A medical worker collects nucleic acid sample at a testing site in Yuhua District of Shijiazhuang, north China's Hebei Province, Jan. 25, 2021. Citizens at quarantine sites and those at areas designated as medium or high-risk for COVID-19 in Shijiazhuang need to receive nucleic acid tests every 48 hours starting from Monday. (Xinhua/Zhu Xudong)
