Omicron as severe as previous Covid variants, large study finds

The study, which is undergoing peer review at Nature Portfolio and was posted on Research Square on May 2, was adjusted for confounders including demographics, vaccination status, and the Charlson comorbidity index.

The Omicron variant of the SARS-CoV2 virus is intrinsically as severe as previous variants, unlike assumptions made in previous studies that it was more transmissible but less severe, a large study in the United States has found.