Ronald Ross received the 1902 Nobel Prize in Medicine and Physiology for his work on malaria.
For further reference, read about Ronald Ross's belief in God in Chapter 23 of Tihomir Dimitrov's book 50 Nobel Laureates and Other Great Scientists Who Believe in God (2007), (http://nobelists.net/; viewed 19 April 2007). Dimitrov has said that Ronald Ross was a Christian whose denomination was probably Anglican (personal correspondence, 19 April 2007), but further research is needed on this point.