Epstein Barr Virus (EBV) is a human herpes virus that is the etiological agent to be associated with a variety of diseases as IM (Infectous Mononucleosis), NPC (nasopharyngeal carcinoma), Hogdkin's disease... EBV infection usually occurs in the early childhood and can persist in the palatine tonsils to induce tonsillitis at the late date.