Funding for this research was provided by:
Wellcome Trust (HRCS(080883/E/06/M))
Received: 14 April 2020
Accepted: 21 July 2020
First Online: 31 July 2020
Ethics approval and consent to participate
: This study received ethical approval from the Scientific and Ethics Review Unit of KEMRI (Ref: KEMRI/SERU/CIPDCR/013/3401). In addition, a research permit to conduct the survey in Busia county was obtained from the Kenya National Council for Science Technology and Innovation (Ref: NACOSTI/P/18/76628/18964).
: Not applicable
: The authors declare no competing interests including any financial, personal, or other relationships with other people or organisation that could inappropriately influence, or be perceived to influence the work.