SARS-CoV-2 Omicron variants BA.1 and BA.2 both show similarly reduced disease severity of COVID-19 compared to Delta, Germany, 2021 to 2022

被引:60
作者
Sievers, Claudia [1 ,2 ,3 ]
Zacher, Benedikt [1 ]
Ullrich, Alexander [1 ]
Huska, Matthew [4 ]
Fuchs, Stephan [4 ]
Buda, Silke [1 ]
Haas, Walter [1 ]
Diercke, Michaela [1 ]
an der Heiden, Matthias [1 ]
Kroeger, Stefan [1 ]
机构
[1] Robert Koch Inst, Dept Infect Dis Epidemiol, Berlin, Germany
[2] Robert Koch Inst, Postgrad Training Appl Epidemiol PAE, Berlin, Germany
[3] European Ctr Dis Prevent & Control ECDC, European Programme Intervent Epidemiol Training E, Stockholm, Sweden
[4] Robert Koch Inst, Dept Genome Sequencing & Genom Epidemiol, Berlin, Germany
关键词
D O I
10.2807/1560-7917.ES.2022.27.22.2200396
中图分类号
R51 [传染病];
学科分类号
100401 ;
摘要
German national surveillance data analysis shows that hospitalisation odds associated with Omicron lineage BA.1 or BA.2 infections are up to 80% lower than with Delta infection, primarily in = 35-year- olds. Hospitalised vaccinated Omicron cases' proportions (2.3% for both lineages) seemed lower than those of the unvaccinated (4.4% for both lineages). Independent of vaccination status, the hospitalisation frequency among cases with Delta seemed nearly threefold higher (8.3%) than with Omicron (3.0% for both lineages), suggesting that Omicron inherently causes less severe disease.
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