Beijing Shunyi the source of this outbreak to find out! Enter asymptomatic infections from outside Indonesia

On the afternoon of the 30th, at the 196th press conference on the prevention and control of the outbreak of new coronavirus pneumonia in Beijing, Pang Xingfire, deputy director of the municipal CDC, introduced that the city CDC conducted genome-wide sequencing analysis of confirmed cases of the outbreak, asymptomatic infection and related environmental samples of the virus, and the results showed that the virus belonged to the L genotype European family branch 2.3, for the same transmission chain, with some of the virus strains found in Southeast Asia in November 2020.
virus has no genetic association with the overseas imported cases and domestic cases previously found in China, and the continuous spread of domestic outbreaks in recent months is not a new variant strain in the United Kingdom or South Africa.
, the case report as of December 29 at 24:00, the local cluster outbreak in Shunyi District involved a total of 16 cases of new coronary pneumonia virus infection, of which 14 cases were locally confirmed cases, 1 case of local asymptomatic infection and 1 case of asymptomatic infection imported from abroad.
16 cases of infected persons are now addressed in Shunyi District.
were reported in order: 1 case on 23 December, 2 cases on 25 December, 6 cases on 26 December and 7 cases on 28 December.
clinical subtypes were: 6 cases of general type, 8 cases of light, 2 cases of asymptomatic infection, no heavy and critical heavy cases.
II, infection source analysis Beijing CDC confirmed cases of the outbreak, asymptomatic infected people and related environmental samples of the virus, carried out genome-wide sequencing analysis, the results show that the outbreak virus belongs to the L genotype of the European family branch 2.3, for the same transmission chain, with some of the virus strains found in Southeast Asia in November 2020 are of high ffogeneity, the possibility of overseas import.
virus has no genetic association with the overseas imported cases and domestic cases previously found in China, and the continuous spread of domestic outbreaks in recent months is not a new variant strain in the United Kingdom or South Africa.
epidemiological investigation and genetic sequencing results, the source of the initial investigation of the outbreak was a new case of asymptomatic infection reported on December 28 (hereinafter referred to as case 1).
case 1 is a male, 28 years old, Indonesian national, long-term living in Indonesia, entered from Indonesia on 26 November 2020, for Fujian Province reported a case of imported cases outside Indonesia in the same flight seat close contact.
was quarantined in Fujian for 14 days and tested negative for nucleic acids before arriving in Beijing on December 10, where he lived in Shunyi District.
Tested negative for neo-coronavirus nucleic acid on 26 December, positive for serum IgM antibodies, positive for neo-coronavirus nucleic acid in its place of residence and workplace on 27 December, transferred from 120 negative pressure ambulances to Ditan Hospital, positive for neo-coronavirus nucleic acid on 28 December, comprehensive epidemiological history, clinical performance, laboratory testing and imaging examination, and was diagnosed as a symptom-free infected person on the same day.
, the transmission chain analysis through the field investigation evidence obtained suggests that the local cluster outbreak in Shunyi District for a single transmission chain. case
1 is the source of a clustered outbreak, after arriving in Beijing to the tenant case 2 (a woman, 29 years old), and during the shopping period spread to Shunyihua Union Business Super Employee Case 3 (a woman, 31 years old).
case 3 is a key case in the chain of transmission, transmitted to case 4 (a man, 34 years old) during the over-sale of clothing, and case 4 is the first confirmed case of the outbreak to be reported. case
3 transmission to her husband case 5 (a man, 31 years old), 6 cases (a man, 40 years old) transmitted to a driver of a network car during the ride of the network car, 7 cases (a woman, 31 years old) and case 8 (a woman, 32 years old) transmitted to the same country during a joint party, shopping, and the same trip to the network car.
case 6 was transmitted to the same network driver 11 (a male, 43 years old) through a joint meal.
cases 7 and 8 were transmitted to her husband 9 (a man, 33 years old) and 10 cases (a man, 31 years old), respectively.
cases 5, 7, 9, 10 are located in Jinma Industrial Park, Shunyi District, through joint work and dinner and other gathering activities, resulting in cases 12 (a man, 32 years old), 13 (a man, 28 years old), 14 (a man, 42 years old), 15 (a man, 32 years old), 16 (a woman, 43 years old) infection.
4. After the outbreak of the Jinma Industrial Park, the municipal and district disease control agencies carried out a full range of environmental sampling and testing on the Jinma Industrial Park in Shunyi District, and only tested positive for neovirus nucleic acid in some environmental samples in the workplace of the confirmed cases, while the rest of the environment was not detected.
After further sampling and testing of personnel and environment of a company in Jinma Industrial Park in all downstream enterprises in Beijing, the personnel specimens were negative and only positive for neo-coronavirus nucleic acid was detected in some environmental samples.
environmentally positive specimens were applied from the surface of the object and the surface of the outer packaging, and the internal items in the sealed packaging did not detect positive nucleic acids for the new coronavirus.
Combined with the time series of case incidence, environmental positive distribution, spread to the population range and gene sequence results, considering the environmental positive for a company in Jinma Industrial Park confirmed cases of detox caused by environmental pollution, after comprehensive analysis basically excluded through imported goods caused by the Jinma Industrial Park staff infection, and then triggered the park's follow-up cluster outbreak.
, the company has recently issued cargo tracking and testing, personnel control, nucleic acid testing and environmental disinfection measures to further reduce the risk of spread of the epidemic.
5. Conclusions Synthesis of the above evidence, preliminary judgment, the outbreak is caused by a case of asymptomatic infection imported from outside Indonesia, a number of points in Shunyi District, a continuing case, and in Shunyi District Jinma Industrial Park caused by the local cluster outbreak.
Based on the existing evidence-based basis, no asymptomatic infected persons (male, 16 years old) and asymptomatic infected persons who left for South Korea on December 23 have been found to be infected with local aggregation in Shunyi District, and the source of the infection is still under investigation.
addition, according to the Shunyi District Committee Standing Committee, executive vice-president of the current Wei introduced, as of 12 pm today, has been checked to close 1239 people, have been implemented control.
said at the same time, will start the key area nucleic acid detection and re-examination work.
According to the laws of flow traceability and expert recommendations, to eliminate hidden transmitters to the maximum extent, to develop a programme of work on re-nucleic acid testing, and to carry out no less than three retests of key population groups in key areas of positive cases.
has now formed a team of 1,000 samplers and 4,500 service support personnel to conduct the first round of retests on a 1:1 scale for personnel in key areas starting at 7 p.m. today.
as of 1500 hours, 246,000 people had been sampled.
23rd, the district has completed a total of 1.3278 million samples of personnel, has resulted in 1.3015 million people, all negative.
CCTV News Source: CCTV News Copyright Notice: All text, images and audio and video materials on this website that indicate "Source: Mets Medicine" or "Source: MedSci Original" belong to Metz Medical, without authorization, no media, website or individual may reproduce, and the authorised reprint must indicate "Source: Mes Medicine".
all reprinted articles on this website are for the purpose of transmitting more information and clearly indicate the source and author, and media or individuals who do not wish to be reproduced may contact us and we will delete them immediately.
at the same time reproduced content does not represent the position of this site.
leave a message here