Secondhand Smoke vs Vape: What the Science Says 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 Don't Be Fooled, E cig Aerosol Is Not Harmless for Kids American Lung Association Digital Download Materials "Secondhand Smoke" Maine Prevention Store 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.