What do you do when misinformation gets a grip on someone you love? It's a dilemma journalist Anke Richter has been faced with many times before in her work on cults and conspiracies. She explains how the anti-vaccine movement operates - and what to do if you want to help a friend or family member out of the rabbit hole. Produced for Stuff by Bird of Paradise with support from NZ On Air.Learn more about your ad choices. Visit megaphone.fm/adchoices