Scientists have developed a long-sought treatment — perhaps even a cure — for sickle cell anemia. But getting it to patients might be an even bigger challenge. This episode was produced by Miles Bryan, edited by Matt Collette, fact-checked by Laura Bullard and Victoria Dominguez, engineered by Efim Shapiro, and hosted by Sean Rameswaram. Transcript at vox.com/todayexplained   Support Today, Explained by making a financial contribution to Vox! bit.ly/givepodcasts Learn more about your ad choices. Visit podcastchoices.com/adchoices