As e cigarette use grows, more research needed on long term effects of vaping American Heart Association Secondhand vape exposure: Risks and side effects Can you get second hand smoke from a vape? Understanding Secondhand Vape Smoke Eliquidstop Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Focused on the Facts: Secondhand Marijuana Smoke American Nonsmokers' Rights Foundation no smoke.org