Below is an instruction from Human. Write a response.
    ### Instruction:
    Who is at risk for Stroke? ?
    ### Response:
    A risk factor is a condition or behavior that increases your chances of getting a disease. Having a risk factor for stroke doesn't mean you'll have a stroke. On the other hand, not having a risk factor doesn't mean you'll avoid a stroke. But your risk of stroke grows as the number and severity of risk factors increase.
    