Viral infection: Mononucleosis is a viral infection. The organism, Epstein Barr, is a sibling of herpes and chicken pox. You get it by being exposed and having your body not fight it off. The initial symptoms usually resolve in a few weeks. It takes an average of 3 months to be completely recovered; some sooner, some later. You are contagious only for the first few weeks. It is not highly contagious.
Answered 6/30/2014
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