Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA 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% News Is Second Hand Vape Smoke Harmful? Juul study shows secondhand vaping emissions are less toxic than cigarette smoke The risks of vape pens' secondhand aerosols Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center