This round of infections started in Nanjing, in east China’s Jiangsu Province, when nine airport cleaners at the Nanjing Lukou International Airport tested positive during routine testing on July 20.
The mega-city with a population of more than 9.3 million had reported a total of 190 locally transmitted confirmed cases by Friday, according to local authorities.
By Saturday noon, Nanjing had designated 30 areas as medium-risk for COVID-19 and one as high-risk. All tourist sites in the city have been closed since Saturday.
Nanjing authorities also announced a 10-day overall disinfection plan for the Lukou International Airport on Saturday. The city is also drafting a disinfection plan for the residence of airport staff.
In order to enhance its nucleic acid testing capabilities, Nanjing has built six advanced air-inflated testing labs, which can screen up to 1.8 million people every day by using the mixed testing approach.
Three rounds of testing have been conducted citywide. Municipal authorities said Saturday that the city will organize vaccinations for those who are qualified to get the second shot in low-risk areas.
Viral genome sequencing has found all strains to be the highly infectious Delta variant, said Ding Jie, deputy director of the Nanjing municipal center for disease control and prevention, on Friday.- XINHUA