What is the virus of Cangzhou epidemic?

Cangzhou epidemic belongs to branch 7 of Omicron mutant BF. According to the public information of relevant inquiries, as of February 6, 65438, the epidemic situation in Cangzhou City was spread by Omicron strain. The results show that the virus belongs to branch 7 of Omicron mutant BF, and it has the characteristics of fast spread and strong concealment. Compared with earlier original strains and other evolutionary branches, it has stronger immune escape ability.