Funding for this research was provided by:
Received: 22 October 2021
Accepted: 16 February 2022
First Online: 3 March 2022
: This study was a part of survey which was approved by the Cameroonian National Ethics Committee and the Ministry of Public Health. Prior to blood specimen collection, written informed consent was obtained from each participating adult (or parents, in case of minors).
: Not applicable.
: The authors declare that they have no competing interests.