Funding for this research was provided by:
Wellcome (107769/Z/10/Z, 212176, 201866, 103602)
Received: 23 December 2020
Accepted: 25 March 2021
First Online: 4 May 2021
: Not applicable. The manuscript does not contain any individual person’s data. It uses secondary aggregated data previously published in Macharia et al. [CitationRef removed] or available open access from online data repositories for registered users.
: Not applicable. The manuscript does not contain any individual person’s data.
: The authors declare that they have no competing interests.