Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Hepatitis A ?
    ### Response:
    Your liver is the largest organ inside your body. It helps your body digest food, store energy, and remove poisons. Hepatitis is an inflammation of the liver. One type, hepatitis A, is caused by the hepatitis A virus (HAV). The disease spreads through contact with an infected person's stool.
    