In secondhand vape, scientists smell risk American Heart Association Complete Guide to Secondhand Vaping Devices Vape Direct Second Hand Vaping Vape Smoke Free Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek Is passive vaping a hidden risk to the public? Here's what the experts know so far ABC News