Smokers who see others using JUUL electronic cigarettes want to smoke UChicago Medicine Vaping is not harmless. A new study from Johns Hopkins Medicine reveals that e cigarettes significantly increase the risk of COPD and high blood pressure. Our own Dr. Todd Hoopman shares firsthand accounts Nicotine formula used by e cigarette maker Juul is nearly identical to the flavor and addictive profile of Marlboro cigarettes : r science What Happens Next for Vaping WIRED