Received: 15 November 2021
Accepted: 10 June 2022
First Online: 6 July 2022
: The study was approved by the Tanzania National Institute for Medical Research (NIMR) committee with a reference number NIMR/HQ/R.8a/Vol. IX/2694 and a written informed consent was obtained from the pregnant women. Blood testing was done by a Laboratory Technician to avoid contaminations and ensuring safety of the participants. In addition, all study methods were performed in accordance with the Tanzania National Institute for Medical Research guidelines and regulations.
: Not Applicable in this study.
: The authors declare that they have no competing interests.