Fig. 1

Trends in and distributions of CFR. a Epidemiological curves of COVID-19 CFR by WHO region from 28 January 2020 to 31 January 2022. b Global distribution of CFR in the original, Alpha, Delta, and Omicron periods
Trends in and distributions of CFR. a Epidemiological curves of COVID-19 CFR by WHO region from 28 January 2020 to 31 January 2022. b Global distribution of CFR in the original, Alpha, Delta, and Omicron periods