Smoke and vapor may disappear but the danger doesn't. That's why it is important to preserve smoke free spaces. Tobacco smoke and vape aerosol cause indoor air pollution increasing risk New study reveals worrying link between vaping and these life threatening diseases Vaping Indoors and How it Contributes to Sick Home Syndrome Bactronix New study finds exhaled e cigarette vapour particles disappear within seconds EurekAlert! Vaping: It's hard to quit, but help is available Harvard Health