Figure 4From: Active case surveillance, passive case surveillance and asymptomatic malaria parasite screening illustrate different age distribution, spatial clustering and seasonality in western Kenya Graphs of incidence rates. (Cases/1,000 population/year) (left panel) and parasite prevalence (%) (right panel) against distance to the nearest river with swamps in Iguhu (A and B), Emutete (C and D) and Mbale (E and F) in western Kenya.Back to article page