Madeleine Finlay speaks to former Guardian health editor Sarah Boseley about the rise in vaping among under-18s and what can be done to discourage more children from taking up the habit. She also hears from Prof Linda Bauld about the impact of vaping on young people. Help support our independent journalism at <a href="https://www.theguardian.com/sciencepod">theguardian.com/sciencepod</a>
