Does Vaping Cause Secondhand Smoke? Researchers Warn of Potential Harm From E Cigarette Secondhand Vapor AZPM When someone vapes around others they expose them to 'second hand aerosol'. But what happens to that aerosol then? Does it disappear or is it like cigarette smoke and stays around, sticking to Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Secondhand Smoke vs Vape: What the Science Says