Secondhand Smoke Second hand E cigarette Vapour Increases Risk Of Poor Respiratory Health Study Finds Cigarette Smoke Detector Don't Be Fooled, E cig Aerosol Is Not Harmless for Kids American Lung Association Tobacco Smoke, Vaping, and Asthma AAFA.org Did you know? Second hand smoke can cause serious health conditions, including lung cancer, heart diseases, and even stroke! Kids are especially vulnerable, so protect yourself and theirs by keeping Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA