Fig. 2
From: Spatiotemporal visualization for the global COVID-19 surveillance by balloon chart
Time-associated alteration of the crude case-fatality rate, cumulative incidence and mortality of COVID-19 in UN geographic regions by month, Feb. 1st to Dec. 20th 2020. Cumulative incidence: Cumulative cases/population; CFR: Cumulative deaths/cumulative cases; Mortality: Cumulative deaths/population. The size of balloon represents cumulative number of confirmed COVID-19 cases. The tail of the balloon in each monthly freeze frame records the change of indicators in each region within the month. Regions with cumulative deaths less than 100 were not shown. X and Y-axis are plotted in log scale