A British doctor sparks a global health panic about the safety of vaccines. But even though his work is discredited, he lights a fire that becomes the modern anti-vax movement. Hosted by Alexi Mostrous.  This is part 1 of a 3-part series - to listen exclusively to episodes 2 and 3 today subscribe to Tortoise+ on Apple Podcasts or become a member and listen on Tortoise's audio app.  You can find out more about Tortoise: Download the Tortoise audio app - for a listening experience curated by our journalists Subscribe to Tortoise+ on Apple Podcasts for early access and ad-free content  Become a Tortoise member and get access to all of Tortoise's premium audio offerings and more.  Hosted on Acast. See acast.com/privacy for more information.