1. Africa Health Research Institute, Durban 4001, South Africa.
2. School of Nursing and Public Health, University of KwaZulu-Natal, Durban 4001, South Africa.
3. Centre for the AIDS Programme of Research in South Africa (CAPRISA), University of KwaZulu-Natal, Durban 4001, South Africa.
4. Research Department of Infection and Population Health, University College London, London WC1E 6JB, UK.
5. KwaZulu-Natal Research Innovation and Sequencing Platform (KRISP), College of Health Sciences, University of KwaZulu-Natal, Durban 4001, South Africa.
6. Department of Geography and Geographic Information Science, University of Cincinnati, Cincinnati, OH 45220, USA.
7. Institute for Global Health, University College London, London WC1E 6JB, UK.
8. School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Durban 4001, South Africa.
9. Centre for Rural Health, School of Nursing and Public Health, University of KwaZulu-Natal, Durban 4001, South Africa.
10. Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, MA 02138, USA.
11. Heidelberg Institute for Public Health, University of Heidelberg, Heidelberg 69117, Germany.
12. Division of Infection and Immunity, University College London, London WC1E 6JB, UK.