A medical worker collects a swab sample from a student for nucleic acid testing at No. 9 middle school in Longyan, southeast China's Fujian Province, Sept. 15, 2021. Recently, a new round of nucleic acid testing has been launched for all teachers, students and staff in schools in Fujian province due to the latest COVID-19 resurgence. (Photo by Zhou Yangdong/Xinhua)
A medical worker collects a swab sample from a student for nucleic acid testing at No. 9 middle school in Longyan, southeast China's Fujian Province, Sept. 15, 2021. Recently, a new round of nucleic acid testing has been launched for all teachers, students and staff in schools in Fujian province due to the latest COVID-19 resurgence. (Photo by Zhou Yangdong/Xinhua)
A medical worker collects a swab sample from a teacher for nucleic acid testing at No. 9 middle school in Longyan, southeast China's Fujian Province, Sept. 15, 2021. Recently, a new round of nucleic acid testing has been launched for all teachers, students and staff in schools in Fujian province due to the latest COVID-19 resurgence. (Photo by Zhou Yangdong/Xinhua)
A medical worker collects a swab sample from a student for nucleic acid testing at No. 9 middle school in Longyan, southeast China's Fujian Province, Sept. 15, 2021. Recently, a new round of nucleic acid testing has been launched for all teachers, students and staff in schools in Fujian province due to the latest COVID-19 resurgence. (Photo by Zhou Yangdong/Xinhua)
