Chiwandire, Nicola
Zungu, Nompumelelo
Mabaso, Musawenkosi
Chasela, Charles
Article History
Received: 27 December 2020
Accepted: 24 February 2021
First Online: 6 March 2021
Declarations
:
: Ethical clearance for the secondary analysis was obtained from the University of the Witwatersrand Human Research Ethics Committee (certificate M191181). Ethical approval for the primary studies was obtained from the HSRC Research Ethics Committee (2005 certificate REC: 5/24/05/04; 2008 certificate REC: 2/23/10/07; 2017 certificate REC: 4/18/11/15) and the USA’s Centers for Disease Control and Prevention (CDC). Voluntary informed written consent was submitted by all individuals who agreed to participate in the studies. All methods were performed in accordance with the relevant guidelines and regulations.
: Not applicable<b>.</b>
: The authors declare that they have no competing interests<b>.</b>