Below is an instruction from Human. Write a response.
    ### Instruction:
    what are the symptoms for Hantavirus ?
    ### Response:
    Due to the small number of HPS cases, the "incubation time" is not positively known. However, on the basis of limited information, it appears that symptoms may develop between 1 and 5 weeks after exposure to fresh urine, droppings, or saliva of infected rodents.
    