Vaping: How E cigs Work (Infographic) Live Science When Were Vapes Invented? History of E Cigarettes OK Vape Electronic Cigarettes: A Tangle of Regulation, Public Health, and Public Safety Issues Most E cigarette Users Ages 18 to 29 Never Smoked Before American Cancer Society The History of the Vaping: It goes back further than you think E Cigarette Direct File:How an E cigarette works.jpg Wikimedia Commons