Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Schizophrenia ?
    ### Response:
    Schizophrenia is a serious brain illness. People who have it may hear voices that aren't there. They may think other people are trying to hurt them. Sometimes they don't make sense when they talk. The disorder makes it hard for them to keep a job or take care of themselves.
    