title: Approval by the Food and Drug Administration of polymerized ragweed extract for treatment of ragweed-sensitive individuals.
mesh_terms: D003888:Desensitization, Immunologic; D006801:Humans; D010936:Plant Extracts / Q000276:immunology*; D011058:Pollen / Q000276:immunology*; D011108:Polymers; D006255:Rhinitis, Allergic, Seasonal / Q000276:immunology / Q000628:therapy; D014481:United States; D014486:United States Food and Drug Administration
chemical_list: D010936:Plant Extracts; D011108:Polymers