Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Stroke ?
    ### Response:
    Stroke -- A Serious Event A stroke is serious, just like a heart attack. Each year in the United States, approximately 795,000 people have a stroke. About 610,000 of these are first or new strokes. On average, one American dies from stroke every four minutes.
    