Log-hepcidin correlates with log-ferritin and log-sTfR levels at the start and end of the malaria season. (A) Correlation between log-hepcidin and log-ferritin levels in Kenyan children. (B) Correlation between log-hepcidin and log-ferritin levels in Gambian children. (C) Correlation between log-hepcidin and log-sTfR levels in Kenyan children. (D) Correlation between log-hepcidin and log-sTfR levels in Gambian children. Red filled circles indicate values at the end of the malaria season; black unfilled circles, values at the start of the malaria season. The red line is the line of best fit at the end of the malaria season, and the black line is the line of best fit at the start of the malaria season. Pearson’s correlation coefficients and significance values are presented.