The CDC says it is tracking a new variant of concern dubbed XBB.1.5, which now makes up 40.5% of new infections across the country.
reported that strain appeared to pose a lower risk of hospitalization relative to earlier Omicron variants.
"We've been tracking XBB for weeks as I said, and it was XBB and XBB.1, and they really weren't taking off. They weren't increasing rapidly in proportion," said Mahon.Before evolving into XBB.1.5, XBB had already ranked among the strains with the largest immune-evasion relative to earlier major Omicron strains. Scientists
"We expect that the bivalent booster will provide protection against XBB.1.5 as it has against other Omicron subvariants. And if people haven't gotten it yet, this is a great time to do it," Mahon said. "The XBB.1.5 variant would look similar to the XBB we tested in our study. The R346T/I mutation within the spike increases the ability of the virus to evade antibodies more efficiently," Emory University's Mehul Suthar told CBS News in an email.they will retain efficacy against XBB.
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