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 Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek Secondhand vape exposure detectable in children's saliva, breath Contemporary Pediatrics Sitting somewhere when a cloud of cotton candy vapor washes over you? If you can smell the sweet scent of a vape, that's not a great sign.