Should I Be Concerned About Secondhand Vaping? Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Secondhand Vape Exposure May Be Risky for Asthmatic Teens UCT Lung Institute Tobacco Smoke, Vaping, and Asthma AAFA.org Researchers Warn of Potential Harm From E Cigarette Secondhand Vapor AZPM Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center