title: The varied nature of the immune deficiency states.
mesh_terms: D000293:Adolescent; D000328:Adult; D000921:Antibody-Producing Cells; D002648:Child; D005260:Female; D006801:Humans; D007111:Immunity, Cellular; D007153:Immunologic Deficiency Syndromes / Q000145:classification / Q000235:genetics / Q000276:immunology; D008214:Lymphocytes / Q000276:immunology; D008297:Male; D008875:Middle Aged; D010375:Pedigree