Juul study shows secondhand vaping emissions are less toxic than cigarette smoke Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Secondhand vape plumes could form lung damaging radicals American Chemical Society 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 When someone vapes around others they expose them to 'second hand aerosol'. But what happens to that aerosol then? Does it disappear or is it like cigarette smoke and stays around, sticking to E Cigs and Second Hand Vaping: Dangers and Protections