Growing the research evidence on e cigarettes by Research at CRUK Medium Vaping and Lung Cancer Screening: Reduced Rates Among Vapers Revealed AJMC The Science 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, Use of e cigarettes after quitting smoking increases lung cancer risk Cancerworld Magazine