What is the definition of an allergic reaction?

A misguided reaction to foreign substances by the immune system, the body system of defense against foreign invaders, particularly pathogens. 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 ... An allergy index is a measurement that indicates the level of allergens present in the air. It helps people with allergies to anticipate and manage their ... ... allergy information through Fluid Self-Service. Expand all sections. Pages Used to Report Allergies as Employees, Press Enter to expand. Page Name. Definition ... People have allergies to all kinds of things, including milk, chocolate, corn, dust, mold, and just about any kind of animal you can think of. Allergy was ... Jan 21, 2014 ... ... define allergy. How hard was it ... . His suggestion was that everyone should write their definition of allergy and send it to me by post. ... definition of innate lymphoid cells which mirror the functions of Th2 cells. Moreover, there is a important set of "Type 2" innate effector cells, including ... May 1, 2004 ... This new report, “Adult Chronic Rhinosinusitis: Definitions, Diagnosis, Epidemiology, and Pathophysiology,” includes guidance on how to measure a patient's ... 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 ... Allergen: Any antigen that causes allergic reactions such as pollens, mites, foods,etc. Antibody: People produce these molecules in response to antigen ...