Chinanews.com, Beijing, January 13 (Chen Hang) Pang Xinghuo, deputy director of the Beijing Centers for Disease Control and Prevention, said at a press conference on December 14, 2020 that Beijing reported 1 case of positive nucleic acid test after the quarantine period expired. Of confirmed cases, and 3 newly confirmed local cases among close contacts.

  Pang Xinghuo said that combined with epidemiological investigation and gene sequencing analysis, Case 1 who arrived in Beijing from Hong Kong, China, was the source of the epidemic.

Analysis and judgment show that this epidemic is not from the same source as the local clustered epidemic in Shunyi District, Beijing.

A total of 4 confirmed cases were involved

  According to Pang Xinghuo, as of 24:00 on January 12, 2021, the epidemic involved a total of 4 confirmed cases of new coronary pneumonia, including 1 imported from abroad, 3 locally, 3 cases of clinical classification as mild, 1 case of normal type, none Heavy and critical.

  She said that the Beijing Municipal Agency for Disease Control and Prevention quickly carried out traceability work to investigate the source of infection. After epidemiological investigation, nucleic acid testing of personnel and environmental samples, and whole-genome sequencing analysis, the source of the epidemic was initially determined and the transmission chain was basically mastered.

Case 1 There is another imported case from Hong Kong, China on the same flight

  Case 1 (a male, 27 years old), worked in Hong Kong, China from February to November 2020, and took Hong Kong Airlines flight HX336 from Hong Kong, China to Beijing Capital Airport on November 28. The health screening by the customs revealed that the nucleic acid test result was negative , After closed-loop management for centralized isolation medical observation, the nucleic acid test results were all negative during the centralized isolation period.

After the quarantine period expired on December 12, he moved into the third floor of the main building of a hotel in Chaoyang District; on the evening of December 13, he developed fever and other symptoms, and went to the fever clinic of the hospital on December 14. The new coronavirus nucleic acid test result was positive, and the diagnosis was confirmed that day Case.

  Case 2 (a female, 48 years old), an employee of a Baozi shop, and case 3 (a female, 46 years old), a employee of a Baozi shop living in the same staff dormitory, the dormitory is located on the third floor of the hotel's annex, the main building and the annex There are channels connected between them.

Cases 2 and 3 were taken as close contacts of case 1 for medical observation in intensive isolation on December 15; on December 17 they were detected in the aisle between the main building and the annex of the hotel, the dormitory rooms in the annex and the environmental specimens outside the public area The new coronavirus nucleic acid was positive; on December 18, Case 2 and Case 3 were diagnosed as confirmed cases.

  Case 4 (a male, 4 years old), because his father had a history of exposure to a bun shop, his family was under home medical observation on December 19. Case 4 had direct contact with the food packaging of a bun shop that his father bought home Bag, diagnosed as a confirmed case on December 29.

  Pang Xinghuo said that according to another investigation, there was another imported case (a male, 60 years old) from Hong Kong, China, on the same flight as Case 1. On December 11, 2020, he was diagnosed before the release of centralized quarantine and medical observation. 1 The flight seats are far apart, there is no history of contact during the same flight, no other confirmed cases on the same flight, and no history of contact in the isolated hotel.

There is no genetic association with the virus of previous imported cases and local cases

  Pang Xinghuo said that the Beijing Centers for Disease Control and Prevention conducted a whole-genome sequencing analysis of imported cases (a male, 60 years old) from Hong Kong, China, cases 1 to 3 involved in the sporadic epidemic in Chaoyang District, and related environmental positive samples. The results suggest that All the viruses in this epidemic belonged to the European family branch 1 of the L genotype and belonged to the same transmission chain.

  She said that the virus is not genetically related to the imported cases and local cases found in Beijing, nor is it a new variant strain found in the UK or South Africa.

Due to the low viral load, it is difficult to perform whole-genome sequencing analysis of case 4.

Not the same source as the local clustered epidemic in Shunyi District

  Pang Xinghuo said that combined with epidemiological investigations and gene sequencing analysis, case 1 arrived in Beijing from Hong Kong, China, was the source of the epidemic, and it spread to cases 2 and 3 through environmental pollution; Based on evidence, Case 4 has exposure factors related to a confirmed case in a Baozipu, and the association with this epidemic cannot be ruled out.

  She mentioned that analysis and judgment indicate that this epidemic is not from the same source as the local clustered epidemic in Shunyi District, Beijing.

(Finish)