The incidence of subsequent ragweed pollinosis in symptom-free persons having positive reactions to ragweed pollen extract.
D031164:Ambrosia; D052179:Antigens, Plant; D006801:Humans; D015994:Incidence; D010936:Plant Extracts; D006255:Rhinitis, Allergic, Seasonal
D052179:Antigens, Plant; D010936:Plant Extracts; C433085:ragweed pollen
HAY FEVER