Autoimmune diseases are a group of diseases characterized by disturbances in the immune system, which produces autoantibodies that attack healthy tissues of the body. These diseases are more common in women than in men. There are at least 80 types of autoimmune diseases, and all of them are chronic. The exact etiology is unknown, however, a genetic predisposition has been proven. For example, systemic lupus erythematosus can often be observed in several family members, which indicates its genetic basis. Although the number of different autoimmune diseases is high, many of them have similar symptoms, such as fatigue, dizziness, and mild fever. Symptoms can come and go, and the severity of the manifestation varies in different people.

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