Below is an instruction from Human. Write a response.
    ### Instruction:
    Who is at risk for Parasites - Lice - Body Lice? ?
    ### Response:
    Body lice infestation is found worldwide but generally is limited to persons who live under conditions of crowding and poor hygiene who do not have access to regular bathing and changes of clean clothes, such as:
    
     - the homeless,
     - refugees,
     - survivors of war or natural disasters.
    