Parents using e cigs expose kids to dangerous secondhand vapor Futurity Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN 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 Vape Exposure: Effects, Who's at Risk, and More Secondhand vaping: The latest vaping health risk CNET