Vaccine effectiveness against influenza hospitalisation in adults during the 2022/2023 mixed season of influenza A(H1N1)pdm09, A(H3N2) and B circulation, Europe: VEBIS SARI VE hospital network

Author:

Rose Angela M. C.1ORCID,Pozo Francisco23,Martínez‐Baz Iván34,Mazagatos Clara35ORCID,Bossuyt Nathalie6,Cauchi John Paul7ORCID,Petrović Goranka8,Loghin Isabela I.9,Vaikutyte Roberta10,Buda Silke11,Machado Ausenda12ORCID,Duffy Róisín13,Oroszi Beatrix14,Howard Jennifer1,Echeverria Aitziber34,Andreu Cristina15,Barbezange Cyril6ORCID,Džiugytė Aušra7,Nonković Diana16,Popescu Corneliu‐Petru17,Majauskaite Fausta18ORCID,Tolksdorf Kristin11,Gomez Verónica12,Domegan Lisa13ORCID,Horváth Judit Krisztina14,Castilla Jesús34ORCID,García Miriam19,Demuyser Thomas20,Borg Maria‐Louise7,Tabain Irena8,Lazar Mihaela21,Kubiliute Ieva18,Dürrwald Ralf11ORCID,Guiomar Raquel12ORCID,O'Donnell Joan13,Kristóf Katalin14,Nicolay Nathalie22,Bacci Sabrina22,Kissling Esther1ORCID,

Affiliation:

1. Epiconcept Paris France

2. National Centre for Microbiology Institute of Health Carlos III Madrid Spain

3. Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP) Madrid Spain

4. Instituto de Salud Pública de Navarra‐IdiSNA Pamplona Spain

5. National Centre for Epidemiology Institute of Health Carlos III Madrid Spain

6. Sciensano Brussels Belgium

7. Department for Health Regulation Health Promotion and Disease Prevention Msida Malta

8. Croatian Institute of Public Health Zagreb Croatia

9. St Parascheva Clinical Hospital of Infectious Diseases Iasi Romania

10. Lithuanian University of Health Sciences Kaunas Lithuania

11. Robert Koch Institute Berlin Germany

12. National Institute of Health Dr Ricardo Jorge Lisbon Portugal

13. Health Service Executive–Health Protection Surveillance Centre Dublin Ireland

14. Semmelweis University Budapest Hungary

15. Subdirección de Epidemiología, Dirección General de Salud Pública Servicio Extremeño de Salud Mérida Spain

16. Teaching Public Health Institute of Split‐Dalmatia County Split Croatia

17. Dr Victor Babes Clinical Hospital of Infectious and Tropical Diseases Bucharest Romania

18. Institute of Clinical Medicine, Medical Faculty Vilnius University Vilnius Lithuania

19. Dirección General de Salud Pública, Departamento de Sanidad Gobierno de Aragón Zaragoza Spain

20. Department of Microbiology and Infection control UZ Brussel Brussels Belgium

21. “Cantacuzino” National Military–Medical Institute for Research and Development Bucharest Romania

22. European Centre for Disease Prevention and Control Stockholm Sweden

Abstract

AbstractWe conducted a multicentre hospital‐based test‐negative case–control study to measure vaccine effectiveness (VE) against PCR‐confirmed influenza in adult patients with severe acute respiratory infection (SARI) during the 2022/2023 influenza season in Europe. Among 5547 SARI patients ≥18 years, 2963 (53%) were vaccinated against influenza. Overall VE against influenza A(H1N1)pdm09 was 11% (95% CI: −23–36); 20% (95% CI: −4–39) against A(H3N2) and 56% (95% CI: 22–75) against B. During the 2022/2023 season, while VE against hospitalisation with influenza B was >55%, it was ≤20% for influenza A subtypes. While influenza vaccination should be a priority for future seasons, improved vaccines against influenza are needed.

Funder

European Centre for Disease Prevention and Control

Publisher

Wiley

Reference12 articles.

1. World Health Organization (WHO).Recommended composition of influenza virus vaccines for use in the 2022‐2023 northern hemisphere influenza season [Internet].2022. Available at:https://cdn.who.int/media/docs/default-source/influenza/who-influenza-recommendations/vcm-northern-hemisphere-recommendation-2022-2023/202202_recommendation.pdf

2. World Health Organisation and European Centre for Disease Prevention and Control.Flu News Europe season overview.2023. Available at:https://flunewseurope.org/SeasonOverview

3. I‐MOVE influenza and COVID‐19 networks.I‐MOVE‐COVID‐19 hospital network VE generic protocol [internet]. Paris France: Epiconcept;2021. Available at:https://www.imoveflu.org/wp-content/uploads/2021/03/08feb2021_draft_generic_VE_protocol_hospital-based_COVID-19_v07.pdf

4. European Centre for Disease Prevention and Control.Core protocol for ECDC VEBIS studies of COVID‐19 vaccine effectiveness against hospitalisation with severe acute respiratory infection laboratory‐confirmed with SARS‐CoV‐2 or seasonal influenza ‐ version 2.0 [Internet]. Stockholm: ECDC;2023. Available at:https://www.ecdc.europa.eu/sites/default/files/documents/covid-19-vaccine-effectiveness-sari-protocol-version-2.pdf

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