10
Apr
What Is A Allergic Reaction. To defend your body from invaders such as bacteria and viruses that mean you harm. Why Allergic Reactions Happen Your immune system has an important job. The immune system normally protects the body from harmful agents such as bacteria and toxins. The four general types of allergic reaction are immediate cytotoxic immune complex-mediated and delayed hypersensitivity.
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Why Allergic Reactions Happen Your immune system has an important job. Type I hypersensitivity reactions can be seen in bronchial asthma allergic rhinitis allergic dermatitis food allergy allergic conjunctivitis and anaphylactic shock. Wheezing or shortness of breath. Hoarseness or tightness in. The immune system overreacts. Most of the times having an allergic reaction is not serious but there are some that are extremely serious and can even be deadly.
Theyre thought to affect more than 1 in 4 people in the UK at some point in their lives.
When the body senses a foreign substance called an antigen the immune system is activated. The exaggerated reaction to a harmless substance an allergen is called a. It is an IgE-mediated process. Allergies are very common. Why Allergic Reactions Happen Your immune system has an important job. Allergic reactions are exaggerated sensitivities hypersensitive reactions that occur when your immune system responds abnormally to common substances such as pollen dust and certain foods.