Figure 4.

Distributed lag structure of the association between daily rainfall and maximum temperature on the density of Anopheles mosquitoes. The solid lines in each panel represent the model-predicted multiplicative effect on the mean number of mosquitoes per household (mosquito density) associated with either a 1 mm increase in daily rainfall (Panels A and C for A. gambiae and A. funestus respectively), or a 1°C increase in daily temperature at each lag time (Panels B and D for A. gambiae and A. funestus respectively). The grey shaded areas indicate 95% confidence intervals. The structure of the relationship between the coefficient and the lag time is constrained by a 4th order polynomial.