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 Passive vaping time we see it like secondhand smoke and stand up for the right to clean air Secondhand Smoke and Electronic Cigarette Aerosols US EPA Health Effects of Vaping Smoking and Tobacco Use CDC The role of puff volume in vaping emissions, inhalation risks, and metabolic perturbations: a pilot study Scientific Reports