Funding for this research was provided by:
National Institutes of Health (R01 AI147347-01)
Received: 20 February 2020
Accepted: 20 July 2020
First Online: 27 August 2020
Change Date: 24 August 2020
Change Type: Correction
Change Details: An amendment to this paper has been published and can be accessed via the original article.
Ethics approval and consent to participate
: Ethical approval has been obtained from the University of Cape Town Faculty of Health Sciences Human Research Ethics Committee (HREC/REF: 529/2019). Written informed consent including for publication of medical details will be obtained from the participants, with parental consent and participant assent for those under 18 years of age.
: Not applicable.
: The authors declare that they have no competing interests.