What is autoimmune disease?

Autoimmune diseases are mostly chronic and the diseases not contagious, but can cause disability and death. Autoimmune disease is a condition where a person's immune system attacks its own cells, tissues and organs. There is a misunderstanding within the immune system which supposed to protect the owner from dangerous pathogens such as virus and bacteria. In the case of autoimmune disease, the immune system can't differentiate dangerous pathogens and ended up attacking its own healthy cell, tissues and organs.

There are many types of autoimmune diseases, but generally it is divided into two categories of systemic and organ-specific.

Systemic means that the disease can attack all parts of the body or just several organs and tissues (e.g. rheumatoid arthritis, SLE, dermatomyositis, etc). Meanwhile organ-specific means that the disease attacks specific organs (e.g. Hashimoto's thyroiditis, Addison's disease, type 1 diabetes, etc).

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