… Our report demonstrates lower risk of developing severe disease as well as a lower risk of
mortality among patients infected with the Omicron variant as compared with the Delta variant. …

… the Omicron variant infection may … severe disease compared with the Delta variant [5-7].
Current vaccines seem effective against severe and/or critical disease due to the Omicron variant…

… of SARS-CoV-2 has been reported to cause milder disease in … How can we compare disease
severity in Omicron and Delta … disease severity relative to previous variants such as Delta (B…

… and severity of cases due to the Alpha and Delta variant … differences between Alpha and
Delta variants periods. We assessed … between symptoms and severity and the variants. Alpha …

… Delta variant was limited in conducting meta-analysis, those studies that directly compared
the disease severity of variants Delta … for Delta variant cases compared with Alpha variant …

… -CoV-2 Delta variant was associated with more severe disease than was infection with the
Beta variant. Being unvaccinated was associated with greater odds of severe-critical disease. …

… Moderate or severe disease was less likely during the Omicron period and more common …
with the Omicron variant is associated with less severe disease than the Delta variant in a high-…

… Although a direct comparison cannot be made, the proportion of adults with moderate and
severe disease because of the Omicron and Delta variants was remarkably similar to what we …

… severity of disease caused by Delta and Omicron variants over a brief period across the
transition from Delta … obscured the relationship between variant and severity was minimized by …

… As of July 2021, the Delta variant was responsible for … Delta variant is more transmissible
than previously circulating SARS-CoV-2 variants (1); however, whether it causes more severe …