VARIATIONS IN RAGWEED POLLEN EXPOSURE OF INDIVIDUALS IN A METROPOLITAN AREA.
D000485:Allergens; D052179:Antigens, Plant; D004219:District of Columbia; D006801:Humans; D010936:Plant Extracts; D011058:Pollen; D006255:Rhinitis, Allergic, Seasonal
D000485:Allergens; D052179:Antigens, Plant; D010936:Plant Extracts; C433085:ragweed pollen
DISTRICT OF COLUMBIA; HAY FEVER; POLLEN