Map of the area surrounding Anchau, Nigeria, showing movement of population to new settelments and incidences of sleeping sickness, printed, 1945. LSHTM Library & Archives
This map shows population movements to new settlements in Nigeria and also the incidence of Sleeping Sickness by area in 1935. By tracking demographic movements we can reveal how our relationship to the environment affects the spread of disease. These maps were typically prepared by military surveyors. As Tom Koch remarks in his book Cartographies of Disease, 'We are all double agents in the war against disease, encouraging its propagation while simultaneously fighting its diffusion.'