1. Jenner Institute, University of Oxford, Oxford, United Kingdom
2. Pfizer Inc., Groton, Connecticut, USA
3. Division of Pulmonary, Critical Care, and Sleep Medicine, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
4. Departments of Internal Medicine and Molecular Microbiology, Saint Louis University, St. Louis, Missouri, USA
5. Department of Medicine, Imperial College London, London, United Kingdom, and MRC Unit, Banjul, The Gambia
6. Aeras, Rockville, Maryland, USA
7. Department of Immunology and Infection, London School of Hygiene and Tropical Medicine, London, United Kingdom
8. WHO Department of Immunization, Vaccines and Biologicals, Geneva, Switzerland