What are autoimmune diseases?
Our bodies have an immune system that protects us from disease and infection. But if you have an autoimmune disease, your immune system attacks itself by mistake, and you can get sick. Autoimmune diseases can affect connective tissue in your body (the tissue which binds together body tissues and organs). Autoimmune disease can affect many parts of your body, like your nerves, muscles, endocrine system (system that directs your body’s hormones and other chemicals), and digestive system.
