New XBB.1.5 COVID subvariant spreads rapidly in Northeast, sparking concerns it evades vaccines
Three years into the pandemic and yet another new variant of the coronavirus has emerged. The omicron subvariant known as XBB.1.5 now accounts for more than 40% of new COVID infections in the U.S. and around 75% of cases in the Northeast. Dr. Jay Varma of the Cornell Center for Pandemic Prevention and Response joined William Brangham to discuss the concerns.