Downs, S. L.
Madhi, S. A.
Van der Merwe, L.
Nunes, M. C.
Olwagen, C. P.
Funding for this research was provided by:
Bill and Melinda Gates Foundation (OPP1189378)
Department of Science and Technology and National Research Foundation: South African Research Chair Initiative in Vaccine Preventable Diseases
South African Medical Research Council
Article History
Received: 10 August 2021
Accepted: 18 November 2021
First Online: 9 December 2021
Competing interests
: The authors declare no competing interests.