1. Botswana Harvard Health Partnership, Gaborone 0000, Botswana
2. Department of Medical Sciences, Faculty of Allied Health Professions, University of Botswana, Gaborone 0022, Botswana
3. Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
4. Department of Pathology, Division of Medical Virology, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town 7935, South Africa
5. School of Health Systems and Public Health, Faculty of Health Sciences, University of Pretoria, Pretoria 0028, South Africa
6. Department of Strategic Information, Botswana-University of Maryland School of Medicine Health Initiative, Gaborone 0022, Botswana
7. Botswana Ministry of Health, Gaborone 0038, Botswana
8. Division of Infectious Diseases, Brigham & Women’s Hospital, Boston, MA 02115, USA