-- Nanjing, a mega-city with a population of more than 9.3 million in eastern China, has intensified measures to contain the latest COVID-19 outbreak.

-- The viral genome sequencing of 52 cases in the recent resurgence showed that the new cases were highly homologous, suggesting the same transmission chain, and all strains were found to be the highly infectious Delta variant.

-- To curb the COVID-19 resurgence, Nanjing has launched three rounds of all-inclusive nucleic acid testings and urged residents not to leave the city unless necessary.

NANJING, July 30  -- Nanjing, a mega-city with a population of more than 9.3 million in eastern China, has launched the third round of all-inclusive nucleic acid testing to contain the latest COVID-19 resurgence that first emerged at the city's airport.

On July 20, nine airport cleaners at the Nanjing Lukou International Airport tested positive for the virus during a routine inspection. By Thursday, Nanjing, the capital city of Jiangsu Province, had reported a total of 184 locally transmitted confirmed cases and one local asymptomatic case.