Syag,
here are a couple of citations.
1) risk of death was approximately 60% lower among Omicron cases compared to Delta
75% reduction in the risk of hospital admission among those 60 to 69 years old
SARS-CoV-2 variants of concern and variants under investigation in England, UK Health Security Agency, Feb 11, 2022
2) Hospitalization rate by Delta 2x higher than Alpha
Hospital admission and emergency care attendance risk for SARS-CoV-2 delta (B.1.617.2) compared with alpha (B.1.1.7) variants of concern: a cohort study. Lancet, VOLUME 22, ISSUE 1, P35-42, JANUARY 01, 2022
this and other articles are saying that post-hospitalization outcomes for Delta and Alpha are similar.
From these, my statement needs to be corrected:
omicron hospitalization is 80% of Alpha, death rates 50% of alpha. this is for unvaccinated apples-to-apples comparison. I also suspect that these numbers may be skewed due to Omicron cases possibly having previous infections. I did not see whether this was controlled for in the paper.