A medical worker works at the polymerase chain reaction (PCR) laboratory in Beijing Puren Hospital in Beijing, capital of China, June 23, 2020. The PCR lab was put into use on June 15 to conduct nucleic acid testing for COVID-19. (Xinhua/Zhang Yuwei)
Medical worker Yang Huijuan walks out of the polymerase chain reaction (PCR) laboratory in Beijing Puren Hospital in Beijing, capital of China, June 23, 2020. The PCR lab was put into use on June 15 to conduct nucleic acid testing for COVID-19. (Xinhua/Zhang Yuwei)
A medical worker works at the polymerase chain reaction (PCR) laboratory in Beijing Puren Hospital in Beijing, capital of China, June 23, 2020. The PCR lab was put into use on June 15 to conduct nucleic acid testing for COVID-19. (Xinhua/Zhang Yuwei)
A medical worker operates an instrument to conduct nucleic acid extraction at the polymerase chain reaction (PCR) laboratory in Beijing Puren Hospital in Beijing, capital of China, June 23, 2020. The PCR lab was put into use on June 15 to conduct nucleic acid testing for COVID-19. (Xinhua/Zhang Yuwei)
Medical workers wear protective suits before entering a contaminated area in Beijing Puren Hospital in Beijing, capital of China, June 23, 2020. The PCR lab was put into use on June 15 to conduct nucleic acid testing for COVID-19. (Xinhua/Zhang Yuwei)
Medical workers work at the polymerase chain reaction (PCR) laboratory in Beijing Puren Hospital in Beijing, capital of China, June 23, 2020. The PCR lab was put into use on June 15 to conduct nucleic acid testing for COVID-19. (Xinhua/Zhang Yuwei)
A medical worker prepares test reagents at the polymerase chain reaction (PCR) laboratory in Beijing Puren Hospital in Beijing, capital of China, June 23, 2020. The PCR lab was put into use on June 15 to conduct nucleic acid testing for COVID-19. (Xinhua/Zhang Yuwei)
A medical worker conducts nucleic acid extraction at the polymerase chain reaction (PCR) laboratory in Beijing Puren Hospital in Beijing, capital of China, June 23, 2020. The PCR lab was put into use on June 15 to conduct nucleic acid testing for COVID-19. (Xinhua/Zhang Yuwei)
Medical workers check lists of samples at the polymerase chain reaction (PCR) laboratory in Beijing Puren Hospital in Beijing, capital of China, June 23, 2020. The PCR lab was put into use on June 15 to conduct nucleic acid testing for COVID-19. (Xinhua/Zhang Yuwei)
Medical worker Luo Yan prepares test reagents at the polymerase chain reaction (PCR) laboratory in Beijing Puren Hospital in Beijing, capital of China, June 23, 2020. The PCR lab was put into use on June 15 to conduct nucleic acid testing for COVID-19. (Xinhua/Zhang Yuwei)
A medical worker takes out samples at the polymerase chain reaction (PCR) laboratory in Beijing Puren Hospital in Beijing, capital of China, June 23, 2020. The PCR lab was put into use on June 15 to conduct nucleic acid testing for COVID-19. (Xinhua/Zhang Yuwei)
Medical workers check lists of samples at the polymerase chain reaction (PCR) laboratory in Beijing Puren Hospital in Beijing, capital of China, June 23, 2020. The PCR lab was put into use on June 15 to conduct nucleic acid testing for COVID-19. (Xinhua/Zhang Yuwei)
A medical worker wears protective suits before entering a contaminated area in Beijing Puren Hospital in Beijing, capital of China, June 23, 2020. The PCR lab was put into use on June 15 to conduct nucleic acid testing for COVID-19. (Xinhua/Zhang Yuwei)
A medical worker takes out samples from a delivery window at the polymerase chain reaction (PCR) laboratory in Beijing Puren Hospital in Beijing, capital of China, June 23, 2020. The PCR lab was put into use on June 15 to conduct nucleic acid testing for COVID-19. (Xinhua/Zhang Yuwei)
Medical workers check lists of samples at the polymerase chain reaction (PCR) laboratory in Beijing Puren Hospital in Beijing, capital of China, June 23, 2020. The PCR lab was put into use on June 15 to conduct nucleic acid testing for COVID-19. (Xinhua/Zhang Yuwei)
