Full article: Disposable electronic cigarettes chemical composition and health effects of their use. A systematic review Australian researchers have issued one of the strongest warnings yet about vaping, saying a major review of evidence suggests e cigarettes are likely to cause lung and oral cancer. The review found signs E cigarettes contain hazardous substances, addictive and harmful Most E cigarette Users Ages 18 to 29 Never Smoked Before American Cancer Society Lung cancer risks persist with e cigarette use after quitting tobacco smoking Can You Get Lung Cancer From Vaping SMOKO E Cigarettes