The risks of vape pens' secondhand aerosols Tobacco Smoke, Vaping, and Asthma AAFA.org E cigarettes and Vaping Commercial Tobacco Use MN Dept. of Health Tobacco Smoke, Vaping, and Asthma AAFA.org Does cannabis create thirdhand smoke? Thirdhand Smoke Resource Center 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%