Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Adrenal Insufficiency and Addison's Disease ?
    ### Response:
    Autoimmune disorders cause most cases of Addisons disease. Infections and medications may also cause the disease.
                
Autoimmune Disorders
                
Up to 80 percent of Addisons disease cases are caused by an autoimmune disorder, which is when the bodys immune system attacks the bodys own cells and organs.
    