Smokefree DeKalb County DeKalb County Health Department Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA Vape Smoke 220w Risk From Second Hand Smoke On Children Greater Than Previously Thought Second Hand Smoking From Vaping Secondhand Vape Exposure: Effects, Who's at Risk, and More 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.