In secondhand vape, scientists smell risk American Heart Association Complete Guide to Secondhand Vaping Devices Vape Direct Vaping Indoors and How it Contributes to Sick Home Syndrome Bactronix While early research suggests it may not be as dangerous as secondhand smoking, it's still not harmless, experts say. https: www.wate.com news does vaping cause secondhand smoke doctors explain the side effects ?utm_medium=social&utm_source 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