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 E Cigarettes And Vaping Q&A Health BeatHealth Beat Comparison of Nicotine Levels Between Cigarettes and Vapes Ecigator E cigarettes: How they work, risks, and research E Cigarettes, Vapes, and other Electronic Nicotine Delivery Systems (ENDS) FDA How Do Electronic Cigarettes Work? UPMC HealthBeat