Teens inhale cancer causing chemicals in e cigarettes Is Vaping Better Than Smoking? American Heart Association Different types of e cigarettes from the first to fourth generation. Download Scientific Diagram E Cigarettes: A 'Gateway Drug' to Addiction An e cigarette is a battery operated device that heats liquid nicotine, flavoring, and other additives to create an aerosol. This JAMA Patient Page describes e cigarettes and the potential health effects of vaping. https: ja.ma 4dbZqrL How are Non Combusted Cigarettes, Sometimes Called Heat Not Burn Products, Different from E Cigarettes and Cigarettes? FDA