China News Service, August 23. According to the official Weibo news of the Information Office of the Shanghai Municipal People’s Government, the Office of the Shanghai Leading Group for the Prevention and Control of the New Coronary Pneumonia Epidemic issued a message on the 23rd: After an epidemiological investigation, it was released on August 20 and 21 In the 5 local confirmed cases, there were no domestic confirmed cases, asymptomatic infections and close contacts in the 14 days before the onset of the disease, no history of travel in overseas or domestic high-risk areas, and no related cold chain logistics exposure history.
After gene sequencing analysis by the Shanghai Center for Disease Control and Prevention and confirmed by the National Center for Disease Control and Prevention, the new coronavirus infected by the case is a Delta mutant strain, which has low homology with other local confirmed cases in my country recently.
After comprehensive research and analysis by national and Shanghai experts, the source of infection of the five local confirmed cases at Pudong Airport can be focused on people or environments exposed to foreign virus contamination, and personal infections caused by negligence in protection.