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 Psychiatry.org E Cigarettes and Vaping Changes in Concentration of Selected Biomarkers of Exposure in Users of Classic Cigarettes, E Cigarettes, and Heated Tobacco ProductsA Narrative Review E Cigarettes (Vapes) Smoking and Tobacco Use CDC Usage of Electronic Cigarettes Among Youth in the United States Ballard Brief Health impacts of electronic cigarettes ANU National Centre for Epidemiology and Population Health