Study population A total of 40 children will be recruited into the study. Sample size calculations have been made on the basis that this trial aims at substantiating the efficacy results obtained in children in Gabon. In the largest trial of this drug combination done in Gabon, 51 children were recruited, and the per-protocol, PCR-adjusted day 28 cure rate was 89% (42/47; 95% CI, 77 to 96%). Based on this expected 90% efficacy estimate, a sample size of 35 children produces a two-sided 95% confidence interval with a an estimated precision of 20%.