Funding for this research was provided by:
International AIDS Vaccine Initiative (UKZNRSA1001)
Bill and Melinda Gates Foundation
South African Medical Research Council (-)
DELTAS Africa Initiative (DEL-15-006)
South African Department of Science and Technology/National Research Foundation
South Africa National Research Foundation
Sullivan Family Foundation
Received: 21 October 2019
Accepted: 12 February 2020
First Online: 25 March 2020
Ethics approval and consent to participate
: Written informed consent was obtained from each participant. These studies were approved by the Institutional Review Board of Massachusetts General Hospital and Biomedical Research Ethics Committee of the University of KwaZulu-Natal (BF131/11 and E036/06).
: Not applicable.
: The authors declare that they have no competing interests.