Fig. 4From: Effectiveness of piperonyl butoxide and pyrethroid-treated long-lasting insecticidal nets (LLINs) versus pyrethroid-only LLINs with and without indoor residual spray against malaria infection: third year results of a cluster, randomised controlled, two-by-two factorial design trial in TanzaniaAnopheles densities per night per house for each vector species, proportion within group also presented in each of the bar chartBack to article page