Below is an instruction from Human. Write a response.
    ### Instruction:
    Who is at risk for Breast Cancer? ?
    ### Response:
    Some women develop breast cancer and others do not, and the risk factors for the disease vary. Breast cancer may affect younger women, but three-fourths of all breast cancers occur in women between the ages of 45 to 85. In Situ and Invasive Breast Cancer Researchers often talk about breast cancer in two ways: in situ and invasive.
    