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@ Health Times165438+1October1news,165438+1October 8, Tianjin CDC conducted a COVID-19 on 138 local confirmed cases. The results of sequencing analysis showed that compared with North America 3-6,
@ Health Times165438+1October1news,165438+1October 8, Tianjin CDC conducted a COVID-19 on 138 local confirmed cases. The results of sequencing analysis showed that it was highly similar to the strain prevalent in North America from March to June, and belonged to L genotype European branch II.
In June165438+1October 10, the COVID-19 Municipal Center for Disease Control and Prevention conducted COVID-19 genome-wide high-throughput sequencing and sequence comparison on the respiratory tract samples of the 93rd asymptomatic infected person. 1 1 day sequencing analysis showed that it belonged to L genotype European family branch I.
According to the reporter of Health Times, from the epidemic situation in Beijing's new land to the case of Tianjin 137 in June, to the case of COVID-19 in Hebei in June, and to the new local case in Tianjin this time, the virus sequencing results are all the same virus sequence and belong to the same European family!
COVID-19, an epidemic in Beijing, is a "L-genotype European family".
A new epidemic broke out in Beijing on June 1 1. As of July 5th, 335 cases of * * * were confirmed.
On June 18, China CDC officially released the COVID-19 epidemic and virus genome sequence data of Beijing Xinfadi in June 2020 through novel coronavirus National Science and Technology Resource Service System. Three pieces of data are from genome sequence data of confirmed cases in Beijing (NMDC600 13902-0 1) and environmental samples (NMDC600 13903-02).
On June 26th, the Center for Disease Control and Prevention in China, official website released the progress of novel coronavirus epidemic in Beijing in June 2020, calling COVID-19, which was prevalent in Beijing this time, "L genotype European family branch type I".
Previously, researchers from Beijing Center for Disease Control and Prevention, Institute of Pathogenic Biology of China Academy of Medical Sciences, Beijing Genome Institute of Chinese Academy of Sciences, Tsinghua University and Peking University published a research paper entitled "The reappearance of COVID-19 epidemic in Beijing may be due to cold chain food pollution" in the National Science Review. The nucleic acid sequencing and virus genome sequence analysis of epidemic-related cases, environment and food samples in Beijing in June this year were compared with the COVID-19 gene sequence database. It was found that the viruses at seven mutation sites except C6026T mainly existed in Europe.
The 137 case in Tianjin in June is identical to the sequence of Beijing Xinfadi virus.
On June 17, there were 1 COVID-19 confirmed cases in Tianjin, which was the137th confirmed case in Tianjin. But strangely, the patient has never been out of Tianjin and has never been in contact with the confirmed patient, which is undoubtedly like the contact history between the case and the confirmed case.
On June 2 1 day, Tianjin CDC analyzed the COVID-19 genome high-throughput sequencing and sequence of the respiratory specimens of Tianjin 137 confirmed by China CDC, and confirmed that the virus sequence was completely consistent with the related cases in Beijing Xinfadi market, belonging to L genotype European family branch I.
The whole genome sequence of new cases in Hebei in June is the same as that of Beijing case 100%.
On May 6th, Hebei Province newly reported 4 confirmed cases of novel coronavirus. The reporter of Health Times combed the information about official website of Hebei Health and Health Commission and found that in June, there were 3 new confirmed cases/kloc-0 and 6 asymptomatic infections in xiong'an new area, Hebei Province.
On July 10, China CDC released the progress of novel coronavirus epidemic in Beijing in June-July, 2020 (II), pointing out that the Qualcomm number sequence of the whole genome of Hebei and Tianjin COVID-19 is the same as that of the whole genome of Beijing case 100%, and there are also corresponding mutation sites, which belong to European branch I of novel coronavirus L genotype.
The case of 1 138 in Tianjin1October is also a European branch of L genotype.
1 65438+1October 8, Tianjin Report1kloc-0/October 7, Tianjin added1local confirmed case, which was a stevedore of Tianjin Hailian Frozen Food Co., Ltd., with TianjinNo./kloc-0. 10, Tianjin announced 1 asymptomatic patient, who is a cold chain porter in Dongjiang Port of Binhai New Area. Wang Moumou, male, 48 years old, was found to be the 93rd asymptomatic infected person in Tianjin in the "two full coverage" survey of cold chain practitioners and frozen products in Tianjin.
Subsequently, Tianjin CDC smeared the respiratory tract samples and related cold storage environment of 38 local confirmed cases in this city/KLOC-0, and conducted COVID-19 genome-wide high-throughput sequencing and sequence analysis. The sequencing analysis of165438+1October 9 showed that it was highly similar to the strain prevalent in North America from March to June, belonging to L genotype European branch II.
In June165438+1October 10, the COVID-19 Municipal Center for Disease Control and Prevention conducted COVID-19 genome-wide high-throughput sequencing and sequence comparison on the respiratory tract samples of the 93rd asymptomatic infected person. 1 1 day sequencing analysis showed that it belonged to L genotype European family branch I.
Expert: The instructions are all imported from abroad.
Why are all these domestic COVID-19 strains "L genotype European family"?
Zhang Yu, an associate researcher at the China Center for Disease Control and Prevention, told the Health Times that the epidemic situation abroad is at a high level and common, and "L genotype European pedigree I" and "L genotype European pedigree II" may exist in many countries. Many epidemics in China have the same virus sequence belonging to the European family, indicating that the recent epidemics in China were imported from abroad. However, due to the complexity of virus transmission and the difficulty of epidemiological investigation, it is impossible to completely judge that COVID-19 is from the same region or several countries.
According to the sequencing results of COVID-19 virus strains, the epidemic situation in COVID-19 abroad is still at a high level, and the epidemic prevention pressure in COVID-19 at home is still very heavy. At present, the focus of work is still on external defense investment and internal defense rebound. On the one hand, it is necessary to pay attention to the closed-loop management of imported overseas cases to prevent them from being associated with local cases. On the other hand, do a good job in the inspection of imported cold chain packaging, do a good job in the protection of imported cold chain related personnel, and prevent the occurrence of human-to-human transmission.
(The original title is: "Tianjin, Hebei and Beijing COVID-19 cases all have the same virus sequence and belong to the European family")
(This article is from a paper. For more original information, please download the "Paper" APP.)
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