Funding for this research was provided by:
consortium for national health research (RCDG-2012-032)
Armed Forces Health Surveillance Center – Department of Defense Global Emerging Infections System (P0209_15_KY)
Received: 9 December 2019
Accepted: 18 April 2020
First Online: 29 April 2020
Ethics approval and consent to participate
: The study was approved by the scientific and ethics review boards of the Kenya Medical Research Institute, Nairobi Kenya (KEMRI; approved protocol # 2518) and the Institutional Review Board of the Walter Reed Army Institute of Research, Silver Spring, MD (WRAIR; approved protocol #1935). This study was also registered at clinicaltrials.gov (NCT01976780). All participants and/or their legal guardians gave a voluntary written informed consent before any study procedures commenced.
: Not applicable. No personal identifiable data was used in the study. All authors have provided consent to publish the findings in this study.
: The authors declare that they have no competing interests.