Funding for this research was provided by:
Medical Research Council, Department for International Development (MR/S005293/1)
Received: 14 October 2020
Accepted: 11 January 2021
First Online: 3 February 2021
Ethics approval and consent to participate
: Serology data used was from a study (SSC 3847) approved by the Scientific and Ethics Review Unit (SERU) of the Kenya Medical Research Institute.
: Not applicable.
: All authors declare no conflict of interest.