Below is an instruction from Human. Write a response.
    ### Instruction:
    Who is at risk for Marburg hemorrhagic fever (Marburg HF)? ?
    ### Response:
    People who have close contact with African fruit bats, humans patients, or non-human primates infected with Marburg virus are at risk. 
                
Historically, the people at highest risk include family members and hospital staff who care for patients infected with Marburg virus and have not used proper barrier nursing techniques.
    