Electronic cigarettes drastically reduce exposure to toxic substances from tobacco Prevention Observatory of the Montreal Heart Institute 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 Propensity score modeling of adolescent e cigarette use and cognitive performance: One year follow up study Ohio State University part of FDA e cigarette studies PDF) A Review of Electronic Cigarette Use Behaviour Studies