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Fontán-Vela M, Kissling E, Nicolay N, Braeye T, Van Evercooren I, Holm Hansen C, Emborg HD, Fabiani M, Mateo-Urdiales A, AlKerwi A, Schmitz S, Castilla J, Martínez-Baz I, de Gier B, Hahné S, Meijerink H, Starrfelt J, Nunes B, Caetano C, Derrough T, Nardone A, Monge S. 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; 29:2300670. [PMID: 38179626 PMCID: PMC10905661 DOI: 10.2807/1560-7917.es.2024.29.1.2300670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 12/11/2023] [Indexed: 01/06/2024] Open
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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Affiliation(s)
- Mario Fontán-Vela
- National Centre of Epidemiology, Carlos III National Health Institute (ISCIII), Madrid, Spain
- Public Health and Epidemiology research group, School of Medicine and Health Sciences, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
| | | | - Nathalie Nicolay
- Vaccine Preventable Diseases and Immunisation, European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | | | | | - Christian Holm Hansen
- Department of Infectious Disease Epidemiology and Prevention, Statens Serum Institut (SSI), Copenhagen, Denmark
| | - Hanne-Dorthe Emborg
- Department of Infectious Disease Epidemiology and Prevention, Statens Serum Institut (SSI), Copenhagen, Denmark
| | - Massimo Fabiani
- Infectious Diseases Department, Istituto Superiore di Sanità, Rome, Italy
| | | | - Ala'a AlKerwi
- Ministry of Health, Directorate of Health, Service epidemiology and statistics, Luxembourg
| | - Susanne Schmitz
- Ministry of Health, Directorate of Health, Service epidemiology and statistics, Luxembourg
| | - Jesús Castilla
- CIBER Epidemiología y Salud Pública (CIBERESP), Spain
- Instituto de Salud Pública de Navarra - IdiSNA, Pamplona, Spain
| | - Iván Martínez-Baz
- CIBER Epidemiología y Salud Pública (CIBERESP), Spain
- Instituto de Salud Pública de Navarra - IdiSNA, Pamplona, Spain
| | - Brechje de Gier
- Center for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - Susan Hahné
- Center for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | | | | | - Baltazar Nunes
- Departamento de Epidemiologia, Instituto Nacional de Saúde Doutor Ricardo Jorge, Departamento de Epidemiologia, Lisboa, Portugal
| | - Constantino Caetano
- Departamento de Epidemiologia, Instituto Nacional de Saúde Doutor Ricardo Jorge, Departamento de Epidemiologia, Lisboa, Portugal
| | - Tarik Derrough
- Vaccine Preventable Diseases and Immunisation, European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | | | - Susana Monge
- National Centre of Epidemiology, Carlos III National Health Institute (ISCIII), Madrid, Spain
- CIBER on Infectious Diseases (CIBERINFEC), Madrid, Spain
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