%0 Journal Article %A Kahn, Fredrik %A Bonander, Carl %A Moghaddassi, Mahnaz %A Rasmussen, Magnus %A Malmqvist, Ulf %A Inghammar, Malin %A Björk, Jonas %T Risk of severe COVID-19 from the Delta and Omicron variants in relation to vaccination status, sex, age and comorbidities – surveillance results from southern Sweden, July 2021 to January 2022 %D 2022 %J Eurosurveillance %V 27 %N 9 %P 2200121 %R doi:https://doi.org/10.2807/1560-7917.ES.2022.27.9.2200121 %K variant of concern %K epidemiological surveillance %K SARS-CoV-2 vaccine effectiveness %U https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2022.27.9.2200121