Is Secondhand Vaping Something to be Concerned About? Secondhand smoke and secondhand aerosol Evidence Mounts About the Health Impact of Second Hand Vaping Bisnar Chase Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Researchers Warn of Potential Harm From E Cigarette Secondhand Vapor AZPM