(HealthDay News) -- Pollen from weeds, grasses and trees are common culprits for seasonal allergies, but don't forget about other things that can trigger a case of the sneezes.
The American College of Allergy, Asthma & Immunology says other possible allergens could include:
Screening for certain immune cells might help doctors assess reactions to treatment, researchers say
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Food sensitivity and intolerance may be mistaken for allergic reaction, even by doctors
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In some regions, smog and high ragweed pollen levels combine to make it hard to breathe
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