Infectious MononucleosisHerpesvirus 4, HumanAntibodies, HeterophileEpstein-Barr Virus InfectionsAntibodies, ViralHemagglutination TestsImmunoglobulin MEpstein-Barr Virus Nuclear AntigensAgglutininsSplenic RuptureLymphoproliferative DisordersHerpesvirus VaccinesOropharynxAntigens, ViralSerologic TestsLymphocytesBurkitt LymphomaHodgkin DiseaseHerpesviridae InfectionsFluorescent Antibody TechniqueAcute DiseaseReed-Sternberg CellsLymphocytosisFatigue Syndrome, ChronicAntigens, HeterophileHerpesviridaePalatine TonsilHistiocytesViral Matrix ProteinsLatex Fixation TestsB-LymphocytesLeukocyte Count