Figure 2.

(a) The emanator efficacy at reducing biting on a person at different distances as observed in the Tanzanian study. Black points correspond to the percentage reduction in human landing catches on volunteers (vertical black lines indicate corresponding 95% confidence interval estimates) while the red line shows the fitted continuous exponential function E(x). (b) Four theoretical examples of the (exponential) distribution that represent the population median distance from their emanator, be it 1 m (black line), 2 m (yellow) 5 m (blue) or 10 m (green). (c) Overall estimates of emanator efficacy taking into consideration the time taken close to a device. Black line shows the proportion of bites averted by the emanator over all distances (y-axis) for a given median population distance from an emanator (x-axis) and the emanator efficacy outlined in (a).