title: Why does humoral immunity decline with age?
mesh_terms: D000375:Aging; D000818:Animals; D000917:Antibody Formation; D000937:Antigen-Antibody Reactions; D000941:Antigens; D001327:Autoimmune Diseases / Q000209:etiology; D001402:B-Lymphocytes / Q000276:immunology; D001854:Bone Marrow Cells; D016026:Bone Marrow Transplantation; D005260:Female; D006801:Humans; D007109:Immunity; D007111:Immunity, Cellular; D007153:Immunologic Deficiency Syndromes / Q000209:etiology; D066298:In Vitro Techniques; D051379:Mice; D008810:Mice, Inbred C57BL; D008815:Mice, Inbred Strains; D013154:Spleen / Q000637:transplantation; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000941:Antigens