CDC: The outbreak in Beijing has been effectively controlled

BEIJING, July 10 (Xinhua) -- China's Centers for Disease Control and Prevention (CENTER) announced on its official website the progress of the new coronavirus pneumonia outbreak in Beijing from June to July 2020 (II). It is pointed out that Beijing since June 13 closed the wholesale market has passed 22 days, close to the two longest incubation period, the risk of continued exposure of the relevant exposed persons has been basically eliminated. At present, Beijing has been a week in a row the number of new cases per day in single digits, and are from the effective management of the population, the risk of subsequent new infections is low, the Beijing outbreak has been effectively controlled.
, a new type of coronavirus pneumonia epidemic related to the wholesale market of agricultural products in Beijing occurred on June 11. As of 2400 hours on 6 July, a total of 400 cases (including 362 confirmed cases and 38 cases of asymptomatic infection) had been reported in this outbreak of neo-crown pneumonia. The outbreak affected 7 provinces and cities, of which a total of 366 cases were reported in Beijing (335 confirmed cases, 31 cases of asymptomatic infection), 27 cases in Hebei (21 confirmed cases, 6 cases of asymptomatic infection), 3 cases in Liaoning (3 confirmed cases), 1 case in Sichuan (confirmed case), 1 case in Tianjin (confirmed case), 1 case in Zhejiang (confirmed case), and 1 case in Henan (asymptomatic infection).
In terms of case sample test results, the CDC's new coronavirus genome-wide high-flux sequence determination of 52 confirmed case samples in Beijing showed that compared with the NC_045512 sequence of the Wuhan reference strain, all samples were in C241T, C3037T, Mutations occurred at the four bits of C14408T and A23403G, and GGG mutations at 28881-28883 bits were AAC, conforming to the mutation characteristics of the I gene points of the European family branch of the L genotype. The high-flunam sequence of the whole genome of the new coronavirus in the confirmed case samples in Hebei and Tianjin is 100% the same as that of the whole genome of the Beijing case samples, and there are corresponding variation points, which belong to the European family branch I of the new coronavirus L genotype.
In terms of environmental sample test results, the CDC performed high-genomic sequence determination of the whole genome of the new coronavirus on eight environmental samples in The New Place Market in Beijing, and the results showed that the whole genome sequence of samples from 52 new crown patients was in C241T, C3037T, C14408T, A23403G, GGG28881-28883AAC seven-bit mutation is the same, the same belongs to the L genotype European family branch I.
Talking about the characteristics and trends of the epidemic, the CDC of China initially judged that the Beijing New Development Market-related cluster of new crown pneumonia outbreak is through pollution of the environment, goods, human contact and other exposures caused by a larger outbreak. The outbreak quickly spread to several districts and other provinces in Beijing, and in the relevant markets, households, units, etc. have 29 new outbreaks of local-related aggregation.
according to epidemiological investigation and virus gene sequencing results analysis, the strain that caused the outbreak is L genotype European family branch I, excluding the possibility of human spillage from animal viruses causing this outbreak. How the virus is introduced into the market and the mechanism of its spread and spread within the market is under further investigation.
The China Center for Disease Control and Prevention pointed out that at present, Beijing and other comprehensive prevention and control measures have been effective. It has been 22 days since the closure of the wholesale market in Xinfa on 13 June, close to the two maximum incubation periods, and the risk of continued morbidity of the exposed persons has been largely eliminated. High-risk environment, population has been effectively identified and found, disposed of and included in the scope of control. At present, the number of new cases per day for 1 consecutive week is single digits, and all come from the effective management of the population, the risk of new infections is low, the Beijing outbreak has been effectively controlled. Hebei, Liaoning, Henan, Zhejiang, Sichuan and Tianjin have all effectively controlled the outbreak in Beijing.