According to NBC and other US media reports, the US Centers for Disease Control and Prevention stated that the new variant XBB. 20% for a week.
In the Northeast, about 75% of confirmed cases were infected with XBB.1.5.
Barbara Barbara, director of the division of respiratory viruses at the U.S. Centers for Disease Control and Prevention, said there was no indication that XBB.1.5 would cause more severe disease than other Omicron variants.
While COVID-19 hospitalizations are on the rise across the country overall, there is no increase in hospitalizations in the Northeast.
Pecoutz, a virologist at Johns Hopkins University in the United States, said that XBB.1.5 has an additional mutation that can better bind to cells.
Scientists at Columbia University warned in a study that the increasing number of Omicron XBB subvariants could further impair the efficacy of the new crown vaccine and lead to a surge of breakthrough infections and reinfection.
Responsible editor: [Li Yan]