Role of the immune system in aging.
D000375:Aging; D000818:Animals; D002470:Cell Survival; D004032:Diet; D005823:Genetics; D005853:Geriatrics; D006801:Humans; D007109:Immunity / Q000187:drug effects; D007113:Immunity, Innate; D007157:Immunologic Surveillance; D008136:Longevity; D008221:Lymphoid Tissue / Q000637:transplantation