Popular electronic cigarette may deliver nicotine more effectively than others, researchers say Penn State Health News Rechargeable Disposable Vape Cigarette Style Vape What's in an E Cigarette? American Lung Association Why e cigarettes are dangerous UPMC MyHealth Matters FACT: Most e cigarette users also smoke cigarettes, a pattern known as dual use. This means the tobacco industry isn't helping people quit; it's sustaining addiction through another product. While the industry claims