Since their introduction in Europe in 2006 and the U.S. in 2007, the use of e cigarettes a.k.a., vapes has skyrocketed. A recent review from researchers in Australia found the results How Can Smoking and Vaping Impact Cancer? Urology Care Foundation Comparing the cancer potencies of emissions from vapourised nicotine products including e cigarettes with those of tobacco smoke Tobacco Control Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA Cancer causing Chemical Formed in E cigarette Users School of Public Health University of Minnesota