Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Congenital anosmia ?
    ### Response:
    Congenital anosmia is a very rare condition in which people are born with a lifelong inability to smell. It may occur as an isolated abnormality (no additional symptoms) or be associated with a specific genetic disorder (such as Kallmann syndrome and congenital insensitivity to pain).
    