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 E cigarettes and cancer: new report faces sharp criticism Vejpkollen.se Graphical review: The redox dark side of e cigarettes; exposure to oxidants and public health concerns ScienceDirect Public Health Consequences of E Cigarettes E Cigarette Research, Studies & Reports (Updated 2019) New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking