Below is an instruction from Human. Write a response.
    ### Instruction:
    Is Ankylosing spondylitis inherited ?
    ### Response:
    Is ankylosing spondylitis inherited? Although ankylosing spondylitis (AS) can affect more than one person in a family, it is not a purely genetic disease. While genes seem to play a role, the exact cause of AS is not known. It is considered to be multifactorial, which means that multiple genetic and environmental factors likely interact to affect a person's risk to develop AS.
    