Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA It's Not Just Cigarettes: Vape Residue Sticks on Surfaces Too Thirdhand Smoke Resource Center The health risks of secondhand smoke are widely understood. But what about secondhand vaping? Don't Be Fooled, E cig Aerosol Is Not Harmless for Kids American Lung Association Is Second Hand Vape Smoke Harmful Secondhand smoke and secondhand aerosol Researchers Warn of Potential Harm From E Cigarette Secondhand Vapor AZPM