Allergies

An allergy is defined as a condition that is caused by an inappropriate or exaggerated reaction by the body's immune system. Harmless substances are misidentified by it as potentially dangerous, so the immune response is to form antibodies. These attack the perceived irritants—or allergens—on the surface of the offending substance. The reaction between antibodies and allergens stimulates the release of substances within the body, such as histamine, which cause a variety of irritating symptoms.

Mast cell

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