E cigarettes: 'cancer risk close to zero' Bhekisisa Misconceptions about e cigarette safety might be stopping smokers using them to quit E Cigarette effects on oral health: A molecular perspective ScienceDirect Electronic cigarettes (e cigarettes) are sometimes called e cigs, vapes, vape pens, and electronic nicotine delivery systems (ENDS). E cigarettes come in many shapes and sizes. Most e cigarettes contain nicotine. Get the facts about e cigarettes, Prevalence of cigarette and e cigarette use among U.S. adults eligible for lung cancer screening based on updated USPSTF guidelines ScienceDirect