Below is an instruction from Human. Write a response.
    ### Instruction:
    How to prevent Parasites - Leishmaniasis ?
    ### Response:
    No vaccines or drugs to prevent infection are available. The best way for travelers to prevent infection is to protect themselves from sand fly bites. To decrease the risk of being bitten, follow these preventive measures:
    
Avoid outdoor activities, especially from dusk to dawn, when sand flies generally are the most active.
    