Secondhand Smoke vs Vape: What the Science Says Don't Be Fooled, E cig Aerosol Is Not Harmless for Kids American Lung Association Secondhand Vape Exposure: Effects, Who's at Risk, and More Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC