Figure 8.

Efficacy decay profiles for insecticide-treated nets (ITNs) and effect on dynamics for Namawala, Tanzania dynamics and simple infection model. A, Baseline, no bed nets. B, ITNs distributed every five years with a four-year box efficacy. C, ITNs distributed every five years with an exponentially decaying efficacy with a four-year time constant. D, ITNs distributed every five years, with efficacy constant for two years, followed by exponential decay with a four-year time constant. EIR = entomologic inoculation rate.