London School of Hygiene & Tropical Medicine - Faculty of Infectious and Tropical Diseases, KEMRI-Wellcome Trust - Health Systems and Social Science Research Group, Duke University - Department of Biostatistics and Bioinformatics, Ministry of Public Health & Sanitation - Division of Malaria Control, Health and Literacy Intervention Project, Health and Literacy Intervention Project, London School of Hygiene & Tropical Medicine - Faculty of Epidemiology and Population Health, College of Charleston, Harvard University - Harvard Graduate School of Education and London School of Hygiene & Tropical Medicine - Faculty of Infectious and Tropical Diseases