Funding for this research was provided by:
Bill and Melinda Gates Foundation (OPP1009497)
Department for International Development, UK Government (OPP1009497)
Received: 25 January 2019
Accepted: 27 November 2019
First Online: 12 December 2019
Ethics approval and consent to participate
: This study did not involve any human experimentation. The study protocol for the study in Kenya was submitted to and approved by the Animal Care and Use Committee of the Veterinary Science Research Institute - Kenya Agricultural & Livestock Research Organization (approval code: KALRO-VSRI/IACUC010/07102016). The study protocol for the study in Zambia was submitted to and approved by the Zambian Ministry of Agriculture Ethics Committee (approval number 2014/001). VSRI and CVRI were the legal owners of the animals taking part the clinical studies and written informed consent was obtained from VSRI and CVRI by signing the study protocol.
: Not applicable. The manuscript does not contain any individual person’s data.
: The authors declare that they have no competing interests.