Addressing Secondhand Smoke: Tobacco and Cannabis Smoke in Multi Unit Housing According to a Centers for Disease Control and Prevention (CDC) study, 40% of U.S. adults believe that children's exposure to secondhand aerosol from e cigarettes causes only some or little harm, and 5% 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. Secondhand Smoke vs Vape: What the Science Says Secondhand vape plumes could form lung damaging radicals American Chemical Society Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center