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 The research looked at the chemical composition of "vape smoke" and assessed its cancer risk using data from published animal studies. Read more Genetic evidence that e cigarettes increase cancer (and other disease) risk among young adults Stanton Glantz blog Evidence update on the cancer risk of vaping e cigarettes: A systematic review E Cigarette Vapor Linked to Lung Cancer in Mice Graphical review: The redox dark side of e cigarettes; exposure to oxidants and public health concerns ScienceDirect