1. Lucille Blumberg; National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg, South 
Africa; lucilleb@nicd.ac.za
2. Richard Welch; National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg, South 
Africa; RichardW@nicd.ac.za
3. Joy Ebonwu; National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg, South 
Africa; joye@nicd.ac.za
4. Alfred Musekiwa; School of Health Systems and Public Health, University of Pretoria; alfred.musekiwa@up.ac.za
5. Zinhle Makatini; National Health Laboratory Service, Johannesburg, South 
Africa; zinhle.makatini@nhls.ac.za
6. Waasila Jassat; National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg, South 
Africa; WaasilaJ@nicd.ac.za