what is medical allergies
Allergies, also known as allergic diseases, are a number of conditions caused by hypersensitivity of the immune system to something in the environment that usually causes little problem in most people.
Allergen: A substance that can cause an allergic reaction. Common allergens include ragwee... Allergic reaction: The hypersensitive response of the immune system of an allergic indiv... Allergic rhinitis: Medical term for hay fever, an allergic reaction that mimics a chronic ... Allergy: A misguided reaction to foreign substances by the immune system, the body system ... Allergy shots: See Allergy desensitization.