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Relative vaccine effectiveness against COVID-19 hospitalisation in persons aged ≥ 65 years: results from a VEBIS network, Europe, October 2021 to July 2023
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View Affiliations Hide AffiliationsSusana Mongesmonge isciii.es
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VEBIS-Lot 4 working group: James Humphreys, Alexis Sentís, Joris Van Loenhout, Pierre Hubin, Katrine Finderup Nielsen, Chiara Sacco, Daniele Petrone, Patrizio Pezzotti, Itziar Casado, Aitziber Echeverria, Camino Trobajo-Sanmartín, Stijn Andeweg, Anja Bråthen Kristoffersen, Irina Kislaya, Patricia Soares, Carlos Dias, Ausenda MachadoView Citation Hide Citation
Citation style for this article: . Relative vaccine effectiveness against COVID-19 hospitalisation in persons aged ≥ 65 years: results from a VEBIS network, Europe, October 2021 to July 2023. Euro Surveill. 2024;29(1):pii=2300670. https://doi.org/10.2807/1560-7917.ES.2024.29.1.2300670 Received: 24 Nov 2023; Accepted: 11 Dec 2023
Abstract
To monitor relative vaccine effectiveness (rVE) against COVID-19-related hospitalisation of the first, second and third COVID-19 booster (vs complete primary vaccination), we performed monthly Cox regression models using retrospective cohorts constructed from electronic health registries in eight European countries, October 2021–July 2023. Within 12 weeks of administration, each booster showed high rVE (≥ 70% for second and third boosters). However, as of July 2023, most of the relative benefit has waned, particularly in persons ≥ 80-years-old, while some protection remained in 65–79-year-olds.
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