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 Sitting somewhere when a cloud of cotton candy vapor washes over you? If you can smell the sweet scent of a vape, that's not a great sign. Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA Researchers Warn of Potential Harm From E Cigarette Secondhand Vapor AZPM