Herd Immunity
  • May 18, 2021 8:00 pm
  • 16:25 mins

Much of this last year, we’ve been hearing that the goal for ending the COVID-19 pandemic is to reach “herd-immunity.” But now many public health officials say that won’t happen. Still, we’re told it’s safe for vaccinated people to remove their masks in most places. So are we in the clear? William Petri, a professor of medicine and immunology at the University of Virginia, gives some answers.