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, Vapes, and other Electronic Nicotine Delivery Systems (ENDS) FDA E Cigarettes and Vape Pens Tobacco Prevention Toolkit Stanford Medicine E Cigs Vapes & Pod Based Tobacco Prevention Toolkit Stanford Medicine Vaping may raise cancer and heart disease risk, study suggests Medical research The Guardian