Second Hand Vaping Vape Smoke Free Evidence Mounts About the Health Impact of Second Hand Vaping Bisnar Chase 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. Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Juul study shows secondhand vaping emissions are less toxic than cigarette smoke