Secondhand smoke and secondhand aerosol Researchers Warn of Potential Harm From E Cigarette Secondhand Vapor AZPM Juul study shows secondhand vaping emissions are less toxic than cigarette smoke Vape Smoke 220w Risk From Second Hand Smoke On Children Greater Than Previously Thought Second Hand Smoking From Vaping Complete Guide to Secondhand Vaping Devices Vape Direct Secondhand Smoke and Electronic Cigarette Aerosols US EPA