Podcast:Today, Explained Published On: Mon Mar 15 2021 Description: President Biden says all adults will be eligible for a vaccine by May 1. But for the world to truly return to normal, young people will need shots, too. ProPublica’s Caroline Chen explains how, and when, that might happen. Transcript at vox.com/todayexplained. Learn more about your ad choices. Visit podcastchoices.com/adchoices