Fig. 3

The Standardized Incidence Ratio per year. These figures show the intensity’s degree of malaria incidence per district. The value of SIR is the result of the ratio between the number of observed cases and the expected cases on each stratum. District with high and low incidences relative to the background of whole strata are shown in shades of red and blue, respectively. Malaria strata are delimited by the thick black line. Some districts in low incidence (SIR < 1) shifted to high incidence in the Highlands and Fringe. In the East and West, the high incidence was in the north of each stratum in 2010 and shifted south in 2014