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. Stream your PBS favorites with the PBS app: https://to.pbs.org/2Jb8twG Find more from PBS NewsHour at https://www.pbs.org/newshour Subscribe to our YouTube channel: https://bit.ly/2HfsCD6 Follow us: TikTok: https://www.tiktok.com/@pbsnews Twitter: http://www.twitter.com/newshour Instagram: http://www.instagram.com/newshour Facebook: http://www.pbs.org/newshour Subscribe: PBS NewsHour podcasts: https://www.pbs.org/newshour/podcasts Newsletters: https://www.pbs.org/newshour/subscribe