What Does Vaping Do to Your Lungs? Johns Hopkins Medicine Vaping May Be More Dangerous Than Cigarette Smoking, Studies Show University Hospitals Vaping, Venous Valves, and Vein Disease 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 Second hand vape smoke linked to more asthma symptoms in kids E cigarettes may actually be worse for your heart than regular cigarettes MarketWatch