Below is an instruction from Human. Write a response.
    ### Instruction:
    How to prevent Breast Cancer ?
    ### Response:
    The use of certain medicines and other factors decrease the risk of breast cancer. Anything that decreases your chance of getting a disease is called a protective factor.    Protective factors for breast cancer include the following:            - Taking any of the following:                  -  Estrogen-only hormone therapy after a hysterectomy.
    