Immune diseases generally refer to autoimmune diseases that are caused by immune system's immune response against body components. The immune system normally responds to foreign intruders like as bacteria, viruses, parasites, and transplants by destroying or repelling them. However, certain conditions might cause abnormalities in the body's tissue components or the immune system itself, causing the immune system to mistake its own components for foreign objects to attack. At this time, the immune system will produce antibodies and active lymphocytes that target some of the body's own components, damaging and destroying its own tissues and organs, ultimately leading to disease. Broadly defined immune diseases also include structural or functional abnormalities of the immune system, which can be congenital or acquired.
The immune system is a sophisticated and highly effective system that shields the human body from alien or hazardous invaders. It is specific, inducible, and adaptive. However, faulty identification or other inherent defects can cause the defensive function to fail and even induce the immune system to attack the body itself. This condition is classified into three categories: immune deficiency, autoimmunity, and hypersensitivity. Common immune diseases are listed as follows:
Autoimmune disease means that the body produces an immune response to itself. Autoimmune reactions can occur in a number of ways:
Immunodeficiency disease refers to the inability of the body to produce an appropriate immune response to invading microorganisms. The causes of immunodeficiency diseases can be divided into two types:
An allergic reaction is an excessive immune response to a generally harmless foreign antigen. Allergens may cause allergic reactions after contact with skin or eyes, inhalation, ingestion or injection.
Immune disease prevention and treatment are largely determined by the disease's type and symptoms. Controlling the autoimmune response by inhibiting the immune system is required. It should be noted, however, that many drugs that suppress the immune response will also impair the body's ability to resist disease, especially infection. Prevention is usually the most important factor in immunodeficiency diseases. Furthermore, stem cell transplantation can be used to treat certain immunodeficiency diseases, particularly severe combined immunodeficiency diseases. Stem cells are derived from bone marrow and occasionally blood, and they are frequently employed to treat serious diseases.
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