Vaccine effectiveness against severe COVID-19 during the Omicron wave in Germany: results from the COViK study.
COVID-19
Case-control study
Hospitalization
Omicron
SARS-CoV-2
Vaccine effectiveness
Journal
Infection
ISSN: 1439-0973
Titre abrégé: Infection
Pays: Germany
ID NLM: 0365307
Informations de publication
Date de publication:
Aug 2023
Aug 2023
Historique:
received:
20
12
2022
accepted:
22
02
2023
medline:
19
7
2023
pubmed:
14
3
2023
entrez:
13
3
2023
Statut:
ppublish
Résumé
COViK, a prospective hospital-based multicenter case-control study in Germany, aims to assess the effectiveness of COVID-19 vaccines against severe disease. Here, we report vaccine effectiveness (VE) against COVID-19-caused hospitalization and intensive care treatment during the Omicron wave. We analyzed data from 276 cases with COVID-19 and 494 control patients recruited in 13 hospitals from 1 December 2021 to 5 September 2022. We calculated crude and confounder-adjusted VE estimates. 21% of cases (57/276) were not vaccinated, compared to 5% of controls (26/494; p < 0.001). Confounder-adjusted VE against COVID-19-caused hospitalization was 55.4% (95% CI: 12-78%), 81.5% (95% CI: 68-90%) and 95.6% (95%CI: 88-99%) after two, three and four vaccine doses, respectively. VE against hospitalization due to COVID-19 remained stable up to one year after three vaccine doses. Three vaccine doses remained highly effective in preventing severe disease and this protection was sustained; a fourth dose further increased protection.
Identifiants
pubmed: 36913112
doi: 10.1007/s15010-023-02012-z
pii: 10.1007/s15010-023-02012-z
pmc: PMC10009838
doi:
Substances chimiques
COVID-19 Vaccines
0
Banques de données
DRKS
['DRKS00025004']
Types de publication
Multicenter Study
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1093-1102Informations de copyright
© 2023. The Author(s).
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