[Disease course in patients admitted to Bærum Hospital with the Delta and Omicron variants of the SARS-CoV-2 virus].

Background: Waves of infection have formed the pattern of the COVID-19 pandemic. A wave dominated by the delta variant of the SARS-CoV-2 virus in autumn 2021 was superseded by the omicron variant over the course of a few weeks around Christmas. We describe how this transition affected the population of patients admitted to a Norwegian local hospital with COVID-19.