Below is an instruction from Human. Write a response.
    ### Instruction:
    Who is at risk for Parasites - Schistosomiasis? ?
    ### Response:
    Schistosomiasis is an important cause of disease in many parts of the world, most commonly in places with poor sanitation. School-age children who live in these areas are often most at risk because they tend to spend time swimming or bathing in water containing infectious cercariae.
    