Experimental background to immune deficiency states.
D000818:Animals; D000917:Antibody Formation; D002060:Bursa of Fabricius / Q000502:physiology; D002645:Chickens; D006968:Hypersensitivity, Delayed; D007153:Immunologic Deficiency Syndromes / Q000503:physiopathology*; D008214:Lymphocytes; D008221:Lymphoid Tissue / Q000502:physiology; D011817:Rabbits; D013950:Thymus Gland / Q000502:physiology