Funding for this research was provided by:
Centers for Disease Control and Prevention (1U2GGH001150)
Received: 12 August 2020
Accepted: 17 February 2021
First Online: 27 February 2021
Ethics approval and consent to participate
: Written informed consent was obtained from all participants 18 years and older. Written parental consent was obtained for participants younger than 18 years old before obtaining their written informed consent. The study protocol and research tools were approved by the South African Medical Research Council Research Ethics Committee (Ref. EC036–11/2016), and by the Associate Director for Science in the Centre for Global Health in the Centers for Disease Control and Prevention (Ref. 2017–194).
: All participants were informed that information from this study would be published so that the information can be useful to others and signed a written consent form giving their approval thereof. Those under the age of 18, have written parental/guardian consent for including their data for this publication.
: No conflicts of interest to declare.