Can you give me the dictionary definition of allergy?

An allergy is where your body reacts to something that's normally harmless like pollen, dust or animal fur. The symptoms can be mild, but for some people they ... QDM Datatype and Definition. "Allergy Intolerance". Data elements that ... ["Allergy, Intolerance": "Substance with angiotensin II receptor antagonist ... Feb 2, 2023 ... An allergen is a substance that can cause an allergic reaction. In some people, the immune system recognizes allergens as foreign or dangerous. Definition. Angioedema is swelling that is similar to hives, but the swelling ... Allergy, hypersensitivity, and anaphylaxis. In: Walls RM, Hockberger ... Hives usually start as an itchy patch of skin that turns into swollen red bumps—they can sometimes be mistaken for bug bites. They are also known as nettle rash ... The simplest definition of an allergen is a substance that causes an allergic reaction, broadly speaking, a hypersensitivity immune response, but usually refers ... Oct 7, 2024 ... SUMMARY AND RECOMMENDATIONS · INTRODUCTION · NONALLERGIC ADVERSE FOOD REACTIONS · Food intolerance · - Comparison with food allergy · DEFINITION OF ... It is characterized by one or more symptoms including sneezing, itching, nasal congestion, and rhinorrhea. Many causative agents have been linked to AR. An allergy is a chronic condition involving an abnormal reaction to an ordinarily harmless substance called an allergen. Allergens can include aeroallergens ... Jun 2, 2020 ... of Asthma and Allergies in Childhood) study definition or other comparable definitions), allergic rhinitis (doctor diagnosed or as defined ...