Funding for this research was provided by:
University of Pretoria Doctoral Commonwealth Scholarship (20200846)
Received: 31 March 2022
Accepted: 27 July 2022
First Online: 15 August 2022
: Ethical clearance was obtained from the Human Research Ethics Committee of the University of the Pretoria (Ref: 518/2020), the Namibia University of Science and Technology Faculty of Health and Applied Sciences Research Ethics Board (Ref: FHAS 11/2020) and regulatory approval from the Namibian Ministry of Health and Social Services (Ref: 17/3/3/CMD). As approved by the Ethics committees, anonymised swabs were used and no individual informed consent was obtained.
: Not applicable.
: The authors declare that they have no competing interests.