Vaping Versus Smoking: Are Electronic Cigarettes the Savior? Arteriosclerosis, Thrombosis, and Vascular Biology 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 Juul study shows secondhand vaping emissions are less toxic than cigarette smoke Thirdhand Smoke Resource Center Protecting Californians Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA