Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times 9 signs your teen may be vaping Nebraska Medicine Omaha, NE About E Cigarettes (Vapes) Smoking and Tobacco Use CDC Which Smoking Habit Puts You Most at Risk? 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 vape exposure: Risks and side effects