Vaping: It's hard to quit, but help is available Harvard Health 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 cigarette brands Blu and E lites slam Nicorette 'smear' ad Quitting e cigarettes What to Know About Electronic Cigarettes (E Cigarettes) We break down the key differences between traditional cigarettes and e cigarettescovering: 1 Their compositions and ingredients. 2 The health risks associated with both. 3 Nicotine levels and addiction potential. 4 The impact