Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Multiple sclerosis ?
    ### Response:
    What causes multiple sclerosis? Studies suggest that there are many factors that influence whether a person will develop multiple sclerosis (MS). The factors that contribute to its onset are multiple and may vary from person to person. The signs and symptoms of MS occur as a result of inflammation, loss of the protective nerve covering (myelin), and the breakdown of nerve cells.
    