Secondhand vape plumes could form lung damaging radicals American Chemical Society Don't Be Fooled, E cig Aerosol Is Not Harmless for Kids American Lung Association 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. Project Filter Secondhand Vape Informational Poster #2 Idaho Health Tools Secondhand Electronic Cigarette Aerosol and Indoor Air Quality US EPA