Secondhand Vape Plumes Could Form Lung damaging Radicals 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. E cigarettes and Vaping Commercial Tobacco Use MN Dept. of Health HEALTH Does vaping cause secondhand smoke? Doctors explain the side effects: Details below. Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN