China News Service, November 27. According to the official Weibo news of the Shanghai Municipal Government Information Office, on November 27, the Office of the Shanghai Leading Group for the Prevention and Control of the New Coronary Pneumonia Epidemic issued a message: On November 25, 2021, Shanghai reported 3 cases Local confirmed cases of new coronary pneumonia.
After gene sequencing by the Shanghai Centers for Disease Control and Prevention Laboratory and confirmed by the China Centers for Disease Control and Prevention, the new coronaviruses infected by the three cases were Delta mutant strains, and the virus sequences were highly homologous and belonged to the same transmission chain.
According to the comprehensive epidemiological investigation by the Chinese Center for Disease Control and the Shanghai experts, as well as the search and comparison analysis of the virus gene database, it is believed that the source of infection of the three local confirmed cases can be focused on: The infection caused.