Second hand vape smoke linked to more asthma symptoms in kids Do electronic cigarettes create thirdhand chemical residue? 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% Should I Be Concerned About Secondhand Vaping? Vaping: More teens exposed to dangerous secondhand smoke ABC7