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East Tennessee Children's Hospital
2018 W Clinch Ave
Knoxville, TN 37916
865-541-8000

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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.