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% Secondhand vaping may pose risk to your kids: New study E Cig Vapor Or Secondhand Smoke: Which Is Worse For You? YouTube Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN