title: Development of the concept of immunologic specificity: III.
mesh_terms: D000486:Allergy and Immunology / Q000266:history*; D000918:Antibody Specificity; D002621:Chemistry; D000939:Epitopes; D049671:History, 18th Century; D049673:History, 20th Century; D006968:Hypersensitivity, Delayed / Q000266:history; D007111:Immunity, Cellular; D014165:Transfer Factor / Q000266:history
chemical_list: D000939:Epitopes; D014165:Transfer Factor