Effects Of Second Hand Vape Smoke Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use Researchers Warn of Potential Harm From E Cigarette Secondhand Vapor AZPM Secondhand Vape Exposure May Be Risky for Asthmatic Teens UCT Lung Institute Tobacco Smoke, Vaping, and Asthma AAFA.org Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN