British Contribution TO Tropical Health -- In the Insectory at the London School of Hygiene and Tropical medicine, typical of many in Britain, mosquitos are bred for further research work on malaria, an so yellow fever, both of which diseases they carry to man. Here, Miss Wall is removing an adult mosquito from the cage. She was one of the team of British experts who were responsible for entirely ridding Cyprus on mosquitos, and thus wiping out malaria in the island. May 1, 1951. (Photo by Central Office Of Information Photograph).