Government of Namibia - Ministry of Health and Social Services, University of California, San Francisco (UCSF) - Division of HIV, Infectious Diseases and Global Medicine, University of California, San Francisco (UCSF) - Global Health Group, Namibia Institute of Pathology Limited, Government of Namibia - Ministry of Health and Social Services, Government of Namibia - Ministry of Health and Social Services, Namibia Institute of Pathology Limited, Government of the United States of America - Centers for Disease Control and Prevention (CDC), Government of the United States of America - Centers for Disease Control and Prevention (CDC), University of California, San Francisco (UCSF), Abbott Laboratories, University of California, San Francisco (UCSF), University of California, San Francisco (UCSF), Government of the United States of America - Centers for Disease Control and Prevention (CDC), Harvard University - Harvard Medical School, Harvard University - Massachusetts General Hospital, University of California, San Francisco (UCSF) - Division of HIV, Infectious Diseases and Global Medicine and Government of the United States of America - Centers for Disease Control and Prevention (CDC)