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Allergy and immunology are medical fields that focus on the immune system, which is the body's system for protecting itself against foreign substances, such as bacteria and viruses.

How do we get allergies?

Allergies occur when the immune system overreacts to a substance that is normally harmless, such as pollen or food, and produces an immune response that leads to symptoms such as sneezing, itching, and swelling. Immunology, on the other hand, is the study of the immune system and its functions, including how it protects the body from infection and disease.

Types of allergies

There are many different types of allergies, including respiratory allergies, food allergies, and skin allergies. Respiratory allergies, also known as hay fever or allergic rhinitis, are triggered by substances in the air such as pollen or mold, and can cause symptoms such as sneezing, itchy eyes, and a runny nose. Food allergies occur when the immune system reacts to certain proteins in food, and can cause symptoms such as stomach pain, nausea, and difficulty breathing. Skin allergies, also known as dermatitis, are triggered by substances that come into contact with the skin, and can cause symptoms such as redness, itching, and swelling.


The treatment of allergies and immunologic disorders typically involves identifying the substance or condition that is causing the immune system to overreact and avoiding exposure to it. In some cases, medications such as antihistamines or corticosteroids may be used to manage symptoms. In severe cases, immunotherapy, also known as allergy shots, may be recommended. This treatment involves exposing the patient to increasing amounts of the allergen over time, with the goal of building up the immune system's tolerance to it.

Autoimmune diseases

Immunology also plays a role in the treatment of autoimmune diseases, which are conditions in which the immune system attacks healthy cells in the body. Examples of autoimmune diseases include rheumatoid arthritis, multiple sclerosis, and lupus. Treatment of autoimmune diseases may involve medications to suppress the immune system, as well as lifestyle changes such as a healthy diet and regular exercise.


In conclusion, allergy and immunology are medical fields that focus on the immune system and its role in protecting the body from foreign substances and diseases. Allergies occur when the immune system overreacts to a normally harmless substance, while immunology is the study of the immune system and its functions. Treatment of allergies and immunologic disorders may involve avoiding exposure to the allergen, medications, and in some cases, immunotherapy. Immunology also plays a role in the treatment of autoimmune diseases.


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