Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Sudden Infant Death Syndrome ?
    ### Response:
    Sudden infant death syndrome (SIDS) is the sudden, unexplained death of an infant younger than one year old. Some people call SIDS "crib death" because many babies who die of SIDS are found in their cribs.     SIDS is the leading cause of death in children between one month and one year old.
    