Early research says secondhand smoke from vaping may not be as bad as cigarettes, but it's still not harmless. https: fox59.com news national world does vaping cause secondhand smoke doctors explain the side effects Effects Of Second Hand Vape Smoke Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use Characteristics of second hand exposure to aerosols from e cigarettes: A literature review since 2010 ScienceDirect E Cig Vapor Or Secondhand Smoke: Which Is Worse For You? Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN