Infectious<unk>  (IM) is a very prevalent viral infection caused by the Epstein-Barr virus, a herpes virus. 90% of adults have been exposed to the<unk> , many as little children, when no symptoms or flu-like symptoms are exhibited. In underdeveloped countries, almost everyone is exposed at a very young age, so<unk>  exists mostly in developed countries.
Mononucleosis
Koilocyte
Immunoblast
Histiocyte
Spongiocyte
Oocyte
Reactive lymphocyte
Plasma cell