Trend surface models of 2005 district-level JE incidence as a function of temperature and precipitation.

Apr/May = April temperature/May precipitation, May/Apr = May temperature/April precipitation, t = mean temperature, p = mean precipitation, Rho (ρ) = spatial lag parameter.*statistically significant at α-value 0.1,**statistically significant at α-value 0.05,***statistically significant at α-value 0.01.†All regression β coefficients represent a non-linear increase (or decrease when the coefficient value is negative) in JE incidence when there is a 1-unit increase in each respective predictor variable.