Parents using e cigs expose kids to dangerous secondhand vapor Futurity E Cig Vapor Or Secondhand Smoke: Which Is Worse For You? Vaping Produces Far Less Second Hand Nicotine Than Smoking Respiratory Therapy Protecting Youth From the Harms of Vaping Smoking and Tobacco Use CDC 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