Vaping is not replacing smoking. It is often added to it. This is called dual use. Nearly half of e cigarette users still smoke cigarettes. What this means: Smoking continues alongside vaping E cigarettes to quit smoking? They're as good as nicotine patches Los Angeles Times E cigarettes: helping smokers quit or glamorising a dangerous habit? Vaping The Guardian Largest US study of e cigarettes shows their value as smoking cessation aid Vaping may help some smokers quit, small study says UPI.com The 101 on e Cigarettes Infographic American Heart Association