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 Vaping Around Babies How Secondhand Vapor Smoke Can Harm Kids Differing Opinions About Second Hand Vape Exposure Vaping Post 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.