Illustration of EPI-IPT and seasonal IPT in infants.

<p>The number of children given IPT with two different strategies: 1) four courses of EPI- IPTi given at 3, 4, 9 & 12 months of age and 2) four courses of monthly seasonal IPT given to all infants regardless of their exact age. The EIR function from the model fitted to EIR data from Navrongo is also shown. Fitting of the EIR function is described in detail in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0018947#pone.0018947.s001" target="_blank">Supporting Information S1</a>.</p>