“Hysteria” is an ancient word carrying thousands of years of baggage. Though the terminology has changed, hysteria has not gone away, and in its most baffling instances it can even be contagious. The idea of a mass psychogenic illness can be hard to wrap your head around. A group of people begins experiencing physical symptoms, because of something that started in one of their minds? In today’s episode Dan Taberski, the host of Hysterical, a new podcast about mass hysteria, walks us through the past and present of this phenomenon, why it’s so stigmatized, and why it shouldn’t be. This episode was written by Evan Chung and Willa Paskin and produced by Evan. We produce Decoder Ring with Katie Shepherd and Max Freedman and with help from Sofie Kodner. Derek John is Executive Producer. Merritt Jacob is Senior Technical Director. Special thanks to Marialexa Kavanaugh and Alexandra Anderson. If you haven’t please yet, subscribe and rate our feed in Apple Podcasts or wherever you get your podcasts. And even better, tell your friends. If you’re a fan of the show, we’d love for you to sign up for Slate Plus. Slate Plus members get to listen to Decoder Ring and every other Slate podcast without any ads. You also get unlimited access to Slate’s website. Member support is crucial to our work. So please go to slate.com/decoderplus to join Slate Plus today. Learn more about your ad choices. Visit megaphone.fm/adchoices