Funding for this research was provided by:
Poliomyelitis Research Foundation (18/94)
International AIDS Vaccine Initiative (UKZNRSA1001)
DELTAS AFRICA INITIATIVE GRANT (DEL-15-006)
Received: 24 January 2021
Accepted: 12 April 2021
First Online: 5 May 2021
: Ethical approval for this study was obtained from the Biomedical Research Ethics Committee of the University of KwaZulu-Natal (BE 313/16). Written informed consent was obtained from all study participants at the time of recruitment and patient identity remained confidential.
: Not applicable.
: The authors declare that they have no competing interests.