At about 13:00 on July 13, Zhuhai, Guangdong held a press conference on epidemic prevention and control to report the latest situation of epidemic prevention and control. According to the report, since the outbreak of the Japanese round of epidemic on July 11, as of 12:00 on July 13, Zhuhai City has reported a total of 21 confirmed cases and 14 asymptomatic infections, all of which were found in the same transmission chain. Gene sequencing showed that the new coronavirus gene in this round of epidemic belongs to the evolutionary branch of Omicron BA.5.1. This clade is more contagious and spreads faster than previous strains of the Omicron virus. So far, 8 days before and after, the Omicron BA.5 mutant strain has recently appeared in 7 cities in the mainland, namely: Xi’an, Beijing, Shanghai, Tianjin, Liaoning, Qingdao, and Zhuhai. On July 5, Xi’an, Shaanxi reported that the strains infected by the epidemic in Xi’an were all branches of the BA.5.2 variant of the Omicron variant. On July 6, Beijing notified that the gene sequencing results of the specimens of infected persons 1 to 3 released on July 5 showed that the virus belonged to the BA. . The sequences of imported cases in this city have low sequence homology and are different chains of transmission. Based on the results of epidemiological investigation and gene sequencing, this .
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