Funding for this research was provided by:
Natural Environmental Research Council (NE/S007415/1)
Received: 8 July 2021
Accepted: 8 November 2021
First Online: 22 November 2021
: This manuscript does include human data, but no ethical approval or consent was needed, as this data is freely available through WHO, the WorldBank and the UN Development Programme and completely anonymised. No animal data was used in this research.
: Not applicable.
: The authors declare that they have no competing interests.