Fig. 2From: The effectiveness of older insecticide-treated bed nets (ITNs) to prevent malaria infection in an area of moderate pyrethroid resistance: results from a cohort study in MalawiMonthly incidence of malaria infection and timeline of study activities in first and second cohorts, Liwonde, Malawi. Error bars indicate standard error of rate. * Published data from Lindblade et al. [7]Back to article page