How the Vaccines Will Change Our Lives

Nine vaccines have proved effective at protecting people from developing symptoms of Covid-19. But we don’t know yet how good they are at preventing asymptomatic infections, and keeping vaccinated people from passing the virus on to others. The good news is that preliminary signs suggest they do at least some of both. Jason Gale discusses what we’re learning about how the shots work, as vaccination campaigns continue around the world.See omnystudio.com/listener for privacy information.