A nurse wearing a protective suit and mask takes a nucleic acid test for COVID-19 from a person who either visited or lives near the Xinfadi market in Beijing
On the morning of June 22, Tianjin announced the latest findings of the virus tracing of newly confirmed local cases on June 17. Combining the epidemiological history and gene sequencing results, the preliminary judgment was that the virus were passed from person to person.
Zhang Ying, deputy director of the Tianjin Center for Disease Control and Prevention (CDC) who was in charge of sourcing the virus, said that after multiple investigations, another chef at Conrad Tianjin was positive for serum IgM. The chef has been to Beijing many times in the past month and has been in public places such as restaurants and entertainment venues. The place stayed for a long time, but this person has not shown any symptoms so far. After returning to Tianjin, the chef had intersects with the confirmed cases in his work.
The genetic code of the 137th case virus in Tianjin is exactly the same with the virus in Beijing. All of them belong to the European family "L type".