Infectious MononucleosisAntibodies, HeterophileAntigens, HeterophileHerpesvirus 4, HumanForssman AntigenHemagglutination TestsEpstein-Barr Virus InfectionsImmunoglobulin MAntibodies, ViralLatex Fixation TestsImmunoconglutininsFalse Positive ReactionsAntigens, ViralAntigensEpstein-Barr Virus Nuclear AntigensImmunoglobulin GAgglutininsSplenic RuptureImmunoassayLymphoproliferative DisordersReagent Kits, DiagnosticHerpesvirus VaccinesOropharynxSerologic TestsLymphocytesFluorescent Antibody TechniqueAntigens, BacterialBurkitt LymphomaHodgkin DiseaseHerpesviridae InfectionsAntigens, NeoplasmAcute DiseaseAntigens, SurfaceReed-Sternberg CellsLymphocytosisB-LymphocytesFatigue Syndrome, ChronicHerpesviridaeT-LymphocytesPalatine TonsilHistiocytesViral Matrix ProteinsHLA Antigens