Humoral immunity in aging.
D000375:Aging; D000818:Animals; D000917:Antibody Formation; D000921:Antibody-Producing Cells / Q000502:physiology; D001402:B-Lymphocytes / Q000276:immunology; D002454:Cell Differentiation; D002455:Cell Division; D051379:Mice; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D013601:T-Lymphocytes / Q000276:immunology