From 0: 00 A 24: 00 on November 4, a new case of confirmed re-positive pneumonia in COVID-19 was reported in Beijing; There are no newly reported locally confirmed cases, suspected cases and asymptomatic infected persons. Jane doe, 31, born in Hubei, works in Sweden. Fever occurred on October 11-12, 2020. On October 14, 2020, she was treated in a …

Combined with comprehensive epidemiological investigation and big data analysis, the researchers revealed that the virus source in the concentrated epidemic situation in Xinfadi market in Beijing is very likely to be cold chain imported food in overseas epidemic areas, and proposed that cold chain transportation may be a new way for SARS-CoV-2 to spread. On June 11, 2020, a case …