Fontán-Vela, MarioKissling, EstherNicolay, NathalieBraeye, ToonVan Evercooren, IzaakHolm Hansen, ChristianEmborg, Hanne-DortheFabiani, MassimoMateo-Urdiales, AlbertoAlKerwi, Ala'aSchmitz, SusanneCastilla, JesúsMartínez-Baz, Ivánde Gier, BrechjeHahné, SusanMeijerink, HintaStarrfelt, JosteinNunes, BaltazarCaetano, ConstantinoDerrough, TarikNardone, AnthonyMonge, SusanaVEBIS-Lot 4 working group2024-01-222024-01-222024-01Euro Surveill. 2024 Jan;29(1):2300670. doi: 10.2807/1560-7917.ES.2024.29.1.23006701560-7917http://hdl.handle.net/10400.18/8939VEBIS-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 Machado.Since 2021, the Vaccine Effectiveness, Burden and Impact Studies of coronavirus disease 2019 (COVID-19) and influenza (VEBIS) project monitors vaccine effectiveness (VE) in real-world conditions to inform vaccination programmes in the European Union/European Economic Area (EU/EEA) countries [1]. One project aims to monitor real-time COVID-19 VE using electronic health registries (EHR) in multiple countries, with initial findings previously published [2-4]. We report pooled VE results against hospitalisation due to COVID-19 by number of doses received and time since vaccination in a community-dwelling resident population aged ≥ 65 years between October 2021 and July 2023.engCOVID-19SARS-CoV-2Cohort DesignElectronic Health RecordsHospitalisationVEBIS-Lot 4Multi-country StudyVaccine EffectivenessEuropeCuidados de SaúdeVacinaEfetividadeRegistos Eletrónicos em SaúdeInfecções Respiratóriasjournal article10.2807/1560-7917.ES.2024.29.1.230067038179626