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Teens > Asthma Center > Words to Know > Definition: Allergen
Definition: Allergen

Allergen

(Alérgeno)

An allergen is a medical word for anything that causes an allergic reaction. Allergens can be many different things, including grass, dust mites, or animal dander - the stuff that flakes off dogs' and cats' skin.

Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.
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