Medical workers from Nanfang Hospital collect samples for nucleic acid tests in Liwan District of Guangzhou, south China's Guangdong Province, May 27, 2021. Liwan District of Guangzhou has carried out COVID-19 nucleic acid tests for all citizens from May 26 to 27. Photo:Xinhua
20 people were found to have been infected with COVID-19 in first round of mass testing conducted in Guangzhou, S China’s Guangdong. The results of detected gene sequencing in all infected patients in the city’s latest outbreak were homologous, all from variants detected in India.