We protect kids from cigarette smokelet's do the same with vaping. Secondhand vape isn't harmless, here is what parents need to know: https: www.undo.org disease secondhand vape If someone smokes outside, do they bring thirdhand smoke indoors with them? Thirdhand Smoke Resource Center Characteristics of second hand exposure to aerosols from e cigarettes: A literature review since 2010 ScienceDirect Secondhand smoke and secondhand aerosol