The two newest subvariants of Omicron, BA.4 and BA.5, are spreading across the U.S. and making up a higher percentage of new cases, prompting concerns about increased transmissibility.
Two new omicron subvariants are gaining traction in the U.S., and the Midwest, according to recent numbers from the Centers for Disease Control and Prevention..
slightly less protective against the latest omicron subvariants, ba.4 and 5. we just don t quite know what the next variant is around the corner. we have a now the ba.4 and 5 variants that are increasing. we expect that this booster will provide some protection against future omicron sub variants, but we still don t know. reporter: there are still 4,000 americans with covid going into hospitals every day, and deaths are expected to climb in the coming weeks. experts stress if you re due for a booster, you shouldn t wait for the new vaccine. the better, you know, strategy, is to make sure to top up your immunity. get that protection now and then of course get that future booster when you become eligible. reporter: mow der that executives say they particularly want to provide protection during the respiratory virus season. in north america, that is october into april. this new vaccine could be authorized just in time to do that, david. let s hope so. trevor ault tonight, thank