Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Sleep Apnea ?
    ### Response:
    Sleep apnea is a common sleep disorder characterized by brief interruptions of breathing during sleep. These episodes usually last 10 seconds or more and occur repeatedly throughout the night. People with sleep apnea will partially awaken as they struggle to breathe, but in the morning they will not be aware of the disturbances in their sleep.
    