E cigarettes a tool to reduce inequalities in smoking? UCL Institute of Epidemiology and Health Care Blog Electronic cigarette Wikipedia 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 Digital Download Materials "E Cigarettes" Maine Prevention Store Do e cigarettes kill you? Researchers don't know. Vox