Researchers Warn of Potential Harm From E Cigarette Secondhand Vapor AZPM 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. Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London