Studies are showing that it is safe and possible for peanut allergic individuals to develop a tolerance to peanuts. Researchers point out that the process of building tolerance is not yet perfected and must be done under the close supervision of trained health care professionals. However, recent research is providing hope that in the future, peanuts may pose less risk for those who are allergic. See the link below for CBC's and BBC's summary.
http://www.cbc.ca/player/News/Health/ID/2433681293/
http://www.bbc.co.uk/news/health-25917272