Secondhand Smoke vs Vape: What the Science Says Effects of Secondhand Smoke: Dangers, Prevention, and More Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center The risks of vape pens' secondhand aerosols 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% Solving secondhand "vape smoke" at workand at home