Below is an instruction from Human. Write a response.
    ### Instruction:
    Who is at risk for Marburg hemorrhagic fever (Marburg HF)? ?
    ### Response:
    It is unknown how Marburg virus first transmits from its animal host to humans; however, for the 2 cases in tourists visiting Uganda in 2008, unprotected contact with infected bat feces or aerosols are the most likely routes of infection. 
  
After this initial crossover of virus from host animal to humans, transmission occurs through person-to-person contact.
    