TIANJIN, Nov. 20 (Xinhua) -- Four new locally transmitted COVID-19 cases were confirmed in north China's Tianjin Municipality on early Friday, local authorities said.
Among the four patients, three are residents from the Kanhaixuan residential community in Tianjin, while another one is a community staff, according to the city's center for disease control and prevention.
They tested negative for coronavirus on Nov. 10 in a nucleic acid test after an asymptomatic carrier was found in the community. But the results turned positive Thursday night in a follow-up test.
They were diagnosed as confirmed cases on early Friday after being transferred to a designated hospital.
The Kanhaixuan community was classified as a high-risk area for COVID-19 starting from 2 a.m. Friday, according to the city's epidemic prevention and control headquarters. Enditem
