Ключевые слова: allergen, allergenic, allergic reactions, allergic rhinitis, allergies, allergist, ambrosia, ambrosia shrubs, american common ragweed, antibodies, asthmatic, attention, background, bloomed, blue, botanical, bush, cause, cloudless, common ragweed, copy space, cure, dangerous, disease, environment, fever, green, growth, habitat, illness, immediate, immediate medical attention, inflorescence, leaf, nature, no people, nobody, plant, pollen, pollen allergy, quarantine, ragweed, shrubs, sickness, sky, sneeze, tassel, thickets, toxin, treatment,