
Staff members dispose medical waste outside a PCR (polymerase chain reaction) lab for nucleic acid testing in Xianyou County, southeast China's Fujian Province, Sept. 14, 2021. Three PCR labs have been built in the county to boost nucleic acid detection capacity.Photo:Xinhua

A staff member deals with nucleic acid testing samples in a PCR (polymerase chain reaction) lab in Xianyou County, southeast China's Fujian Province, Sept. 14, 2021. Three PCR labs have been built in the county to boost nucleic acid detection capacity.Photo:Xinhua

A staff member works in a PCR (polymerase chain reaction) lab for nucleic acid testing in Xianyou County, southeast China's Fujian Province, Sept. 14, 2021. Three PCR labs have been built in the county to boost nucleic acid detection capacity.Photo:Xinhua

A staff member walks past a PCR (polymerase chain reaction) lab for nucleic acid testing in Xianyou County, southeast China's Fujian Province, Sept. 14, 2021. Three PCR labs have been built in the county to boost nucleic acid detection capacity.Photo:Xinhua

A staff member works in a PCR (polymerase chain reaction) lab for nucleic acid testing in Xianyou County, southeast China's Fujian Province, Sept. 14, 2021. Three PCR labs have been built in the county to boost nucleic acid detection capacity.Photo:Xinhua

Staff members dispose medical waste outside a PCR (polymerase chain reaction) lab for nucleic acid testing in Xianyou County, southeast China's Fujian Province, Sept. 14, 2021. Three PCR labs have been built in the county to boost nucleic acid detection capacity.Photo:Xinhua

Staff members deal with nucleic acid testing samples in a PCR (polymerase chain reaction) lab in Xianyou County, southeast China's Fujian Province, Sept. 14, 2021. Three PCR labs have been built in the county to boost nucleic acid detection capacity.Photo:Xinhua

Photo taken on Sept. 14, 2021 shows a nucleic acid testing site with three PCR (polymerase chain reaction) labs in Xianyou County, southeast China's Fujian Province. Three PCR labs have been built in the county to boost nucleic acid detection capacity. Photo:Xinhua