title: Progress in allergy. Introduction.
mesh_terms: D000486:Allergy and Immunology / Q000266:history*; D000917:Antibody Formation; D000941:Antigens; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D006967:Hypersensitivity / Q000266:history; D007111:Immunity, Cellular / Q000266:history; D012425:Russia (Pre-1917); D013950:Thymus Gland / Q000276:immunology
chemical_list: D000941:Antigens