Secondhand smoke and secondhand aerosol 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. Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Secondhand Smoke vs Vape: What the Science Says In secondhand vape, scientists smell risk American Heart Association Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN