Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center Evidence Mounts About the Health Impact of Second Hand Vaping Bisnar Chase Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Second hand smoke from e cigarettes 'poses NO risk to the public' Daily Mail Online Juul study shows secondhand vaping emissions are less toxic than cigarette smoke Sitting somewhere when a cloud of cotton candy vapor washes over you? If you can smell the sweet scent of a vape, that's not a great sign.