Secondhand Smoke and Electronic Cigarette Aerosols US EPA Tobacco Smoke, Vaping, and Asthma AAFA.org Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center Can Vaping Cause Lung Cancer? Here's What We Know. Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Don't Be Fooled, E cig Aerosol Is Not Harmless for Kids American Lung Association