1. Vaccines and Immunity Theme; Medical Research Council Unit, The Gambia; Banjul The Gambia
2. Department of Biochemistry, Faculty of Science; University of Yaoundé 1; Yaoundé Cameroon
3. Wellcome Centre for Infectious Diseases Research in Africa; Institute of Infectious Disease and Molecular Medicine and Department of Medicine; University of Cape Town; Observatory Republic of South Africa
4. Department of Medicine; Imperial College; London United Kingdom
5. The Francis Crick Institute; London United Kingdom