Immune responses in aged mice.
D000375:Aging; D000681:Amylases; D000818:Animals; D000917:Antibody Formation; D000941:Antigens / Q000378:metabolism; D001419:Bacteria / Q000201:enzymology; D004912:Erythrocytes; D005260:Female; D008214:Lymphocytes / Q000378:metabolism; D051379:Mice; D012756:Sheep; D013154:Spleen / Q000166:cytology / Q000378:metabolism
D000941:Antigens; D000681:Amylases