On January 3, Zhao Lian, deputy director of the Dalian Municipal Health Commission, said at a press conference on epidemic prevention and control held by the local government that the national, provincial, and municipal CDCs are responding to confirmed cases, asymptomatic infections and related environmental , The cargo sample virus has undergone whole genome sequencing analysis. The virus genome is different from the previous whole genome sequence comparison of the new coronavirus in Dalian City, which excludes the continued spread of the local new coronavirus; the epidemic virus conforms to the L genotype European family L2 The characteristics of branch L2.1 and the results support that the source of transmission is from abroad. The virus genomes in the epidemic genome and the four cold chain products are highly homologous to the virus strains circulating in Russia in November and have strong genetic associations.
Moreover, the whole genome sequence is not genetically related to the imported cases that have been reported in my country and the domestic cases, and it is not the continuous spread of the domestic epidemic in recent months; it is related to the international GISAID database, the local epidemic situation in various domestic provinces and cities, and the import of new coronaviruses abroad Compared with the gene bank, no highly homologous sequence is seen, which is a new input.
It is preliminarily determined that the local epidemic in Dalian comes from imported cold chain products that have contaminated the new crown virus.
(Reporter Yang Yi)
Editor in charge: [Zhou Zhaojun]