Secondhand vape plumes could form lung damaging radicals American Chemical Society Juul study shows secondhand vaping emissions are less toxic than cigarette smoke Tobacco Smoke, Vaping, and Asthma AAFA.org Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Characteristics of second hand exposure to aerosols from e cigarettes: A literature review since 2010 ScienceDirect