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 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 Notes from the Field: E Cigarette and Nicotine Pouch Use Among Middle and High School Students United States, 2024 MMWR Health impacts of electronic cigarettes ANU National Centre for Epidemiology and Population Health