E-cigarettes are devices that heat liquid into a substance that the user inhales. The liquid usually has nicotine and flavoring in it, along with other additives. The nicotine in e-cigarettes and regular cigarettes is addictive. E-cigarettes are considered tobacco products because most of them contain nicotine, which comes from tobacco.
Please use the the following links for important facts on vaping and its side effects.
http://Vaping Resources: FDA Informational Flyer Information from the Surgeon General Facts from the CDC Source: Food & Drug Administration