Immunodepression by viruses.
D000818:Animals; D000917:Antibody Formation; D001354:Avian Leukosis Virus / Q000276:immunology; D002471:Cell Transformation, Neoplastic; D006386:Hemagglutination Tests; D006968:Hypersensitivity, Delayed; D007166:Immunosuppressive Agents; D009052:Leukemia Virus, Murine / Q000276:immunology; D051379:Mice; D009858:Oncogenic Viruses / Q000276:immunology; D014780:Viruses
D007166:Immunosuppressive Agents