The US cracked down on Juul after an uptick in teen vaping and a flurry of health concerns. Podcaster Leon Neyfakh explains how the ban inadvertently created a dangerous new market for unregulated Chinese e-cigarettes. This episode was produced by Miles Bryan, edited and fact-checked by Matt Collette, engineered by Andrea Kristinsdottir and Patrick Boyd, and hosted by Noam Hassenfeld. Transcript at vox.com/today-explained-podcast Support Today, Explained by becoming a Vox Member today: http://www.vox.com/members Learn more about your ad choices. Visit podcastchoices.com/adchoices