Research so far shows that legal e cigarettes are far less harmful than smoking, and can be an effective way of helping people who smoke to quit. However, there isn't enough research yet 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 Evidence update on the cancer risk of vaping e cigarettes: A systematic review Is vaping the most powerful weapon we have against lung cancer? Cancer Prevention and Screening Blog Graphical review: The redox dark side of e cigarettes; exposure to oxidants and public health concerns ScienceDirect