The Immunity Debate Around Vaccine Policies

A.M. Edition for Nov. 29. As the world grapples with the new Omicron variant of Covid-19, the role of immunity from prior infection has gained fresh significance. WSJ's Denise Roland discusses why scientists are divided on whether country-specific vaccine rules should account for prior infection as well as vaccine-induced immunity. Peter Granitz hosts. Learn more about your ad choices. Visit megaphone.fm/adchoices