Fly spit protein holds back parasite infection in monkeys
![sand fly](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/06/ticker_sandfly.jpg?fit=860%2C460&ssl=1)
Proteins from the saliva of sand flies such as Phlebotomus papatasi (shown) and Phlebotomus duboscqi may help scientists develop a vaccine for leishmaniasis, a disfiguring and deadly parasitic infection.
Frank Collins/CDC