1. Division of Infectious Diseases Department of Medicine University of Colorado Anschutz Medical Campus Aurora Colorado USA
2. Division of Infectious Diseases Department of Medicine Emory University School of Medicine Atlanta Georgia USA
3. School of Health and Social Care University of Lincoln Lincoln UK
4. National Health Laboratory Service Durban South Africa
5. Department of Biostatistics and Computational Biology University of Rochester Rochester New York USA
6. University of KwaZulu‐Natal Durban South Africa
7. Divison of Infectious Diseases Brigham and Women's Hospital Harvard Medical School Boston Massachusetts USA
8. Rollins School of Public Health Emory University Atlanta Georgia USA
9. Emory Vaccine Center Emory University Atlanta Georgia USA