Infection with E.B. virus.
D000818:Animals; D000951:Antigens, Neoplasm; D000956:Antigens, Viral; D002415:Cats; D002648:Child; D004854:Herpesvirus 4, Human / Q000472:pathogenicity*; D006801:Humans; D007075:Immunoglobulin M; D007945:Leukemia, Lymphoid / Q000209:etiology / Q000382:microbiology*
D000951:Antigens, Neoplasm; D000956:Antigens, Viral; D007075:Immunoglobulin M