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\begin{document}

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\author[1]{Susana Monge}%
\author[2]{James Humphreys}%
\author[3]{Nathalie Nicolay}%
\author[4]{Toon Braeye}%
\author[4]{Izaak Van Evercooren}%
\author[5]{Christian Holm Hansen}%
\author[5]{Hanne-Dorthe Emborg}%
\author[6]{Chiara Sacco}%
\author[6]{Alberto Mateo Urdiales}%
\author[7]{Jesus Castilla}%
\author[7]{Iván Martínez-Baz}%
\author[8]{Brechje de Gier}%
\author[8]{Susan Hahné}%
\author[9]{Hinta Meijerink}%
\author[9]{Anja Bråthen Kristoffersen}%
\author[10]{Ausenda Machado}%
\author[10]{Patricia Soares}%
\author[2]{Anthony Nardone}%
\author[3]{Sabrina Bacci}%
\author[2]{Esther Kissling}%
\author[2]{Baltazar Nunes}%
\affil[1]{Instituto de Salud Carlos III}%
\affil[2]{Epiconcept SAS}%
\affil[3]{European Centre for Disease Prevention and Control}%
\affil[4]{Sciensano}%
\affil[5]{Statens Serum Institut}%
\affil[6]{Istituto Superiore di Sanita}%
\affil[7]{Instituto de Salud Publica y Laboral de Navarra}%
\affil[8]{Rijksinstituut voor Volksgezondheid en Milieu}%
\affil[9]{Folkehelseinstituttet}%
\affil[10]{Instituto Nacional de Saude Doutor Ricardo Jorge}%


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  \date{June 13, 2024}


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\begin{abstract}
Using a common protocol across seven countries in the European
Union/European Economic Area, we estimated XBB.1.5 monovalent vaccine
effectiveness (VE) against COVID-19 hospitalisation and death in
[?]65-year-olds, during October-November 2023. We linked electronic
records to construct retrospective cohorts and used Cox models to
estimate adjusted Hazard Ratios and derive VE. VE for COVID-10
hospitalisation and death was, respectively, 67\% (95\%CI: 60-72) and
68\% (95\%CI: 44-82) in 65--79-year-olds, and 64\% (95\%CI: 49-75) and
74\% (95\%CI: 56-85) in [?]80-year-olds. Results indicate that periodic
vaccination of individuals [?]65 years has an ongoing benefit, and support
the current vaccination strategies in the EU/EEA.%
\end{abstract}%



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\textbf{Hosted file}

\verb`Main_document.docx`  available at \url{https://authorea.com/users/462723/articles/897192-effectiveness-of-xbb-1-5-monovalent-covid-19-vaccines-during-a-period-of-xbb-1-5-dominance-in-eu-eea-countries-october-to-november-2023}

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