Received: 16 November 2020
Revised: 20 January 2021
Accepted: 22 January 2021
First Online: 5 February 2021
Ethics approval and consent to participate
: Written informed consent was obtained from each study participant before study participation. The ethical approvals were granted by the National Ethics Committee for Health Research (CNERS) in Benin, IRB#06860,1/20/2018. Laboratory analysis was performed with a Benin laboratory trainee at the Centers for Disease Control and Prevention (CDC) as part of a technical training program [CitationRef removed]. The work performed at CDC did not constitute engagement in human subjects research (CDC protocol #2017 − 141).
: Authors gave their consent for publication.
: The authors have no competing interests.