Pre-emption in immunity.
D000818:Animals; D000921:Antibody-Producing Cells; D000941:Antigens / Q000008:administration & dosage; D004912:Erythrocytes / Q000276:immunology*; D006462:Hemolytic Plaque Technique; D006736:Horses; D007108:Immune Tolerance; D007111:Immunity, Cellular; D007274:Injections, Intraperitoneal; D007279:Injections, Subcutaneous; D008198:Lymph Nodes / Q000166:cytology / Q000276:immunology*; D008297:Male; D051379:Mice; D012756:Sheep; D013156:Splenectomy
D000941:Antigens