Department of Infectious Disease Epidemiology, School of Public Health, Faculty of Medicine (St Marys campus), Imperial College London, Norfolk Place, London, W2 1PG, UK. m.walker06@imperial.ac.uk.|Department of Infectious Disease Epidemiology, School of Public Health, Faculty of Medicine (St Marys campus), Imperial College London, Norfolk Place, London, W2 1PG, UK. m.basanez@imperial.ac.uk.|Centre National de Recherche et de Formation sur le Paludisme, BP 2208, Ouagadougou, 01, Burkina Faso. andrelin.cnrfp@fasonet.bf.|Department of Medical Microbiology, Radboud University Medical Centre, Nijmegen, PO Box 9101, 6500 HB, Nijmegen, Netherlands. R.Hermsen@ncmls.ru.nl.|Department of Medical Microbiology, Radboud University Medical Centre, Nijmegen, PO Box 9101, 6500 HB, Nijmegen, Netherlands. Teun.Bousema@lshtm.ac.uk.|MRC Centre for Outbreak Analysis and Modelling, Department of Infectious Disease Epidemiology, School of Public Health, Faculty of Medicine (St Marys campus), Imperial College London, Norfolk Place, London, W2 1PG, UK. thomas.churcher@imperial.ac.uk.