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Allergy Overview

Allergies are diseases of the immune system that cause an overreaction to substances called "allergens." Allergies are grouped by the kind of trigger, time of year or where symptoms appear on the body: indoor and outdoor  allergies (also called "hay fever," "seasonal," "perennial" or "nasal" allergies), food allergies, latex allergies, insect  allergies, skin  allergies and eye  allergies. People who have allergies can live healthy and active lives.

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Glossary Glossary of Allergy Terms

 

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