Below is an instruction from Human. Write a response.
    ### Instruction:
    Who is at risk for Thrombotic Thrombocytopenic Purpura? ?
    ### Response:
    Thrombotic thrombocytopenic purpura (TTP) is a rare disorder. Most cases of TTP are acquired. Acquired TTP mostly occurs in adults, but it can affect children. The condition occurs more often in women and in Black people than in other groups.
                

    