What is an allergy? An allergy is an overreaction of the body’s immune system to an ordinarily harmless substance. Immunoglobulin E (IgE) antibodies play a major role in allergy. When a substance (or allergen) is perceived as threatening, the body’s immune system produces allergen-specific IgE antibodies for protection. From then on, whenever the allergen is … Continue reading Immunotherapy for the treatment of allergy