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% Does Vaping Cause Second Hand Smoke V2 Cigs UK Secondhand Vape Exposure May Be Risky for Asthmatic Teens UCT Lung Institute Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center