Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Autoimmune Hepatitis ?
    ### Response:
    Autoimmune diseases are disorders in which the body's immune system attacks the body's own cells and organs with proteins called autoantibodies; this process is called autoimmunity.
                
The body's immune system normally makes large numbers of proteins called antibodies to help the body fight off infections.
    