Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Parkinson's Disease ?
    ### Response:
    Parkinson's disease does not affect everyone the same way. Symptoms of the disorder and the rate of progression differ among people with the disease. Sometimes people dismiss early symptoms of Parkinson's as the effects of normal aging. There are no medical tests to definitively diagnose the disease, so it can be difficult to diagnose accurately.
    