Fig. 1.
Number of cumulative total of COVID-19 cases (a) and deaths (b) reported up to 27 February, 2021 (WHO 2021b)
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.