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. 2022 Sep 23;10:1018505. doi: 10.3389/fpubh.2022.1018505

Table 1.

Comparison of the four COVID-19 phases epidemiological outcomes.

Original (36 weeks) Alpha (7 weeks) Delta (26 weeks) Omicron (12 weeks)
Total cases (N) 29,166 901 9,280 29,055
Total mortality (N) 393 17 49 181
Case-Fatality Ratio (CFR–%) 1.35 1.89 0.53 0.62
Years of life lost (YLL—years) 4,484 46 444 1,398
YLL/week 125 7 17 52