Figure 3.
The effect of PP with various vector pre-biting, hT2, and protection, bT, times, respectively, and killing ability, η (all times are in days) on the qualitative behaviour of R0 as function of the proportion of the treated group within the population. In green: the treatment always decreases R0. In yellow, the treatment increases R0 below a threshold coverage rate, and decreases R0 above it. In all simulations, gT = gU, hT1 = 3, hU = 3, aT = aU, L = 0.1 d−1, d0 = 0.088 d−1, i.e. the treatment does not affect the host transmission ability and the attractiveness to vectors. (Online version in colour.)