Autoimmune diseases, also known as autoimmune pathologies, are characterized by a malfunction of the body's own cells, which leads to an attack on healthy tissues and cells. The immune system detects its own as foreign and attacks it.
There are two types of autoimmune diseases. Local autoimmune diseases are those that attack a particular organ as in celiac disease. Systemic diseases, on the other hand, are those that affect several areas of the body, such as multiple sclerosis.