Children at risk: Emory study uncovers the hidden dangers of secondhand vape exposure 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% First, Second and Thirdhand Smoke: The Differences and Dangers Tobacco Stops With Me How E Cigarettes Affect Your Body