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 World No Tobacco Day: WHO urged not to snuff out e cig (Update) Largest US study of e cigarettes shows their value as smoking cessation aid What's the Latest on E Cigarettes and Cancer? Dana Farber Cancer Institute New vaping 'popcorn lung like' injury seen in teenage e cigarette user, docs warn