title: Clemens von Pirquet and allergy.
mesh_terms: D000486:Allergy and Immunology / Q000266:history*; D001317:Austria; D002648:Child; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D006967:Hypersensitivity / Q000266:history*; D008511:Medicine; D010372:Pediatrics / Q000266:history; D013038:Specialization; D014481:United States