Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Guillain-Barr syndrome ?
    ### Response:
    Guillain-Barr syndrome is an autoimmune disorder that affects the nerves. Autoimmune disorders occur when the immune system malfunctions and attacks the body's own tissues and organs. In Guillain-Barr syndrome, the immune response damages peripheral nerves, which are the nerves that connect the central nervous system (the brain and spinal cord) to the limbs and organs.
    