Funding for this research was provided by:
World Health Organization (NA)
Received: 18 February 2020
Accepted: 21 September 2020
First Online: 29 September 2020
Ethics approval and consent to participate
: Not applicable. De-identified data was used for this analysis.
: Not applicable.
: Joseph D. Tucker is a Section Editor at BMC Infectious Diseases and the authors reported no other conflict of interest.