Study shows second hand vaping exposure very low compared to second hand smoking Evidence Mounts About the Health Impact of Second Hand Vaping Bisnar Chase Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Have you ever breathed in secondhand vapor from a vape? What exactly are you inhaling? It turns out it's a lengthy list of chemicals. FULL STORY Juul study shows secondhand vaping emissions are less toxic than cigarette smoke E Cigarettes (Vapes) Smoking and Tobacco Use CDC