The latest version of COVID-19 to raise concern is XBB.1.5 -- an omicron #subvariant that now accounts for the biggest portion of cases in the #US

New versions of COVID-19 arise as the #coronavirus mutates. XBB.1.5 is the latest #subvariant of omicron.

Concerns over #Omicron #subvariant BF.7; Centre's #Covid advice .