With three vaccines now approved and news that every adult can get a shot by the end of May, it feels like the U.S. is turning a corner. But, even after getting vaccinated, Americans still have to mask and distance. Why is that? Can you still spread it? And with lots of efficacy numbers out there, is one vaccine ‘better’ than another? James Hamblin and Maeve Higgins ask virologist Angela Rasmussen. Support this show and all of The Atlantic’s journalism by becoming a subscriber at theatlantic.com/supportus. Learn more about your ad choices. Visit megaphone.fm/adchoices