Article History
Received: 14 June 2019
Accepted: 20 June 2019
First Online: 6 July 2019
Compliance with ethical standards
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: This project was supported through a grant (L1/402/14–1) provided to A.S. by the Deutsche Forchungsgemeinshaft (DFG) under the theme, “German–African Cooperation Projects in Infectiology.” We are grateful to the Department of Science and Technology/National Research Foundation (NRF) of South Africa for providing an equipment grant (UID, 75464) and NRF mobility grant (UID, 92598) awarded to A.S.; T.Z. is a recipient of the NRF Innovation Post-Doctoral fellowship UID, 111989 and African–German Network of Excellence in Science junior researcher grant.
: Graham Chakafana declares that he has no conflict of interest. Tawanda Zininga declares that he has no conflict of interest. Addmore Shonhai declares that he has no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.