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Allergy

Similar term(s): hypersensitivity, allergen, allergic reaction, allergic disease, allergic disorder.

Definition:

Allergies are inappropriate or exaggerated reactions of the immune system to substances that, in the majority of people, cause no symptoms.

Symptoms of the allergic diseases may be caused by exposure of the skin to a chemical, of the respiratory system to particles of dust or pollen (or other substances), or of the stomach and intestines to a particular food.

Source: ACAAI Allergy-Immunology Glossary 

More:

An allergen is a substance that causes an allergy.

Related words:

Asthma - Rhinitis

To read about this term in context:

GreenFacts Summary on Respiratory Diseases in Children:

Translation(s):

Deutsch: Allergie
Español: Alergia
Français: Allergie

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