Does Vaping Cause Second Hand Smoke V2 Cigs UK POV: You thought it was just water vapor. Secondhand vape aerosol actually contains: Nicotine (yep, it lingers) Formaldehyde (carcinogen) Heavy metals (nickel, lead, tin) Ultra fine particles E cigarettes get a bad rap but scientists say they can be really helpful in 2 ways AOL 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 Can You Actually Get a Contact High? Green Goods