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% Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Secondhand Vape Exposure: Effects, Who's at Risk, and More Is Second Hand Vape Smoke Bad For You? Learn How to Avoid its Side Effects