E cigarettes can help smokers quitbut do not use them casually, researchers warn 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 and Vaping PPAC Central E Cigarettes Are Effective at Helping Smokers Quit, a Study Says The New York Times Nicotine ECigarettes Help Smokers Quit Review Concludes Powers Health