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% While vaping is not risk free, it is less harmful than tobacco Our World in Data Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Secondhand smoke and secondhand aerosol More middle and high schoolers are getting exposed to secondhand vape aerosols, study indicates The Boston Globe