Main symptoms of infectious mononucleosis (See Wikipedia:Infectious mononucleosis#Signs and symptoms). 
References:

MedicineNet &gt; infectious mononucleosis article Retrieved on 7 Mars, 2009
WebMD &gt; Infectious Mononucleosis Last Updated: September 19, 2007. Retrieved on 7 Mars, 2009
(History section of) eMedicine Specialties &gt; Infectious Diseases &gt; Infectious Mononucleosis. Author: Burke A Cunha, MD, Professor of Medicine
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Mikael Häggström