Juul study shows secondhand vaping emissions are less toxic than cigarette smoke What Does Vaping Do to Your Lungs? Johns Hopkins Medicine 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. It's Not Just Cigarettes: Vape Residue Sticks on Surfaces Too Thirdhand Smoke Resource Center Secondhand smoke and secondhand aerosol Addressing Secondhand Smoke: Tobacco and Cannabis Smoke in Multi Unit Housing