Quick Facts: Immune Disorders
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Allergic Reactions and Other Hypersensitivity DisordersThe immune system is your body's defense system. It helps protect you from illness and infection. The immune system usually reacts to and attacks bacteria, viruses, and cancer cells. An allergy is when your body's immune system reacts to something harmless, such as food, plants, or medicine.
- Overview of Allergic Reactions
- Anaphylactic Reactions
- Angioedema
- Hereditary and Acquired Angioedema
- Autoimmune Diseases
- Exercise-Induced Allergic Reactions
- Food Allergy
- Mastocytosis
- Seasonal Allergy
- Year-Round Allergies
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Immunodeficiency DisordersThe immune system is your body's defense system. It helps protect you from illness and infection. The immune system's job is to attack things that don’t belong in your body, such as germs, parasites, and cancer cells.
