Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Researchers Warn of Potential Harm From E Cigarette Secondhand Vapor AZPM Secondhand vape exposure regulation of CFTR and immune function in cystic fibrosis American Journal of Physiology Lung Cellular and Molecular Physiology American Physiological Society Secondhand e cigarette vape smoke exposure increased in last 4 years, contain harmful toxins: JAMA Network study ABC7 Chicago We protect kids from cigarette smokelet's do the same with vaping. Secondhand vape isn't harmless, here is what parents need to know: https: www.undo.org disease secondhand vape