These numbers are useless going forward if they are based on the original Covid-19 strains and not the Omicron strains, which now account for virtually every case and are tens of times less lethal.
For example, according to "Challenges in Inferring Intrinsic Severity of the SARS-CoV-2 Omicron Variant" (https://www.nejm.org/doi/full/10.1056/NEJMp2119682?query=fea...): "This meaningful but fairly small difference [vs Delta] implies that omicron, alpha, and wild-type SARS-CoV-2 have similar intrinsic severity."