1. Influenza vaccine effectiveness against influenza A subtypes in Europe: Results from the 2021–2022 I‐MOVE primary care multicentre study
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Kissling, Esther, Pozo, Francisco, Martínez‐Baz, Iván, Buda, Silke, Vilcu, Ana‐Maria, Domegan, Lisa, Mazagatos, Clara, Dijkstra, Frederika, Latorre‐Margalef, Neus, Kurečić Filipović, Sanja, Machado, Ausenda, Lazar, Mihaela, Casado, Itziar, Dürrwald, Ralf, van der Werf, Sylvie, O'Donnell, Joan, Linares Dopido, Juan Antonio, Meijer, Adam, Riess, Maximilian, Višekruna Vučina, Vesna, Rodrigues, Ana Paula, Mihai, Maria Elena, Castilla, Jesús, Goerlitz, Luise, Falchi, Alessandra, Connell, Jeff, Castrillejo, Daniel, Hooiveld, Mariette, Carnahan, Annasara, Ilić, Maja, Guiomar, Raquel, Ivanciuc, Alina, Maurel, Marine, Omokanye, Ajibola, Valenciano, Marta, I‐MOVE study team, European Centre for Disease Prevention and Control, EpiConcept [Paris], Institute of Health Carlos III, CIBER de Epidemiología y Salud Pública (CIBERESP), Navarra Institute for Health Research / Instituto de Investigación Sanitaria de Navarra (IdiSNA), Universidad Pública de Navarra [Espagne] = Public University of Navarra (UPNA)-Universidad de Navarra [Pamplona] (UNAV)-Clínica Universidad de Navarra [Pamplona], Robert Koch Institute [Berlin] (RKI), Institut Pierre Louis d'Epidémiologie et de Santé Publique (iPLESP), Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU), Health Service Executive [Dublin] (HSE), National Institute for Public Health and the Environment [Bilthoven] (RIVM), University of Kalmar, Croatian Institute of Public Health [Zagreb] (CIPH), Cantacuzino Institute [Romania], Réseau International des Instituts Pasteur (RIIP), Génétique Moléculaire des Virus à ARN - Molecular Genetics of RNA Viruses (GMV-ARN (UMR_3569 / U-Pasteur_2)), Institut Pasteur [Paris] (IP)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Centre National de Référence des virus des infections respiratoires (dont la grippe) - National Reference Center Virus Influenzae [Paris] (CNR - laboratoire coordonnateur), Institut Pasteur [Paris] (IP)-Université Paris Cité (UPCité), Dirección General de Salud Pública, Public Health Agency of Sweden, Instituto Nacional de Saùde Dr Ricardo Jorge [Portugal] (INSA), Cantacuzino National Medico-Military Institute for Research Development [Bucharest], Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP), Università di Corsica Pasquale Paoli [Université de Corse Pascal Paoli], Partenaires INRAE, University College Dublin [Dublin] (UCD), School of Social Sciences. Campus de Melilla. Univeristy of Granada, Netherlands Institute for Health Services Research [Utrecht] (NIVEL), European Centre for Disease Prevention and Control [Stockholm, Sweden] (ECDC), and tudy teams are very grateful to all patients, general practitioners, paediatricians, laboratory teams, and regional epidemiologists who have contributed to the studies. Participating laboratories submitted their sequences to GISAID (www.gisaid.org) for easy sharing with the central laboratory in Madrid. We would like to acknowledge Mia Brytting, who sadly passed away before publication. She is deeply missed.
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Pulmonary and Respiratory Medicine ,Male ,Adult ,Adolescent ,Epidemiology ,[SDV]Life Sciences [q-bio] ,Vaccine Efficacy ,Multicentre study ,Young Adult ,Influenza A Virus, H1N1 Subtype ,Influenza, Human ,Humans ,Europe, influenza, influenza vaccine, multicentre study, vaccine effectiveness ,Child ,Aged ,Vaccine effectiveness ,Primary Health Care ,Influenza vaccine ,Influenza A Virus, H3N2 Subtype ,Vaccination ,Public Health, Environmental and Occupational Health ,Infant, Newborn ,Infant ,Middle Aged ,vaccine effectiveness ,multicentre study ,Influenza ,Europe ,Infectious Diseases ,Influenza Vaccines ,Case-Control Studies ,Child, Preschool ,Female ,influenza vaccine ,influenza - Abstract
Background: In 2021-2022, influenza A viruses dominated in Europe. The I-MOVE primary care network conducted a multicentre test-negative study to measure influenza vaccine effectiveness (VE). Methods: Primary care practitioners collected information on patients presenting with acute respiratory infection. Cases were influenza A(H3N2) or A(H1N1)pdm09 RT-PCR positive, and controls were influenza virus negative. We calculated VE using logistic regression, adjusting for study site, age, sex, onset date, and presence of chronic conditions. Results: Between week 40 2021 and week 20 2022, we included over 11 000 patients of whom 253 and 1595 were positive for influenza A(H1N1)pdm09 and A(H3N2), respectively. Overall VE against influenza A(H1N1)pdm09 was 75% (95% CI: 43-89) and 81% (95% CI: 45-93) among those aged 15-64 years. Overall VE against influenza A(H3N2) was 29% (95% CI: 12-42) and 25% (95% CI: -41 to 61), 33% (95% CI: 14-49), and 26% (95% CI: -22 to 55) among those aged 0-14, 15-64, and over 65 years, respectively. The A(H3N2) VE among the influenza vaccination target group was 20% (95% CI: -6 to 39). All 53 sequenced A(H1N1)pdm09 viruses belonged to clade 6B.1A.5a.1. Among 410 sequenced influenza A(H3N2) viruses, all but eight belonged to clade 3C.2a1b.2a.2. Discussion: Despite antigenic mismatch between vaccine and circulating strains for influenza A(H3N2) and A(H1N1)pdm09, 2021-2022 VE estimates against circulating influenza A(H1N1)pdm09 were the highest within the I-MOVE network since the 2009 influenza pandemic. VE against A(H3N2) was lower than A(H1N1)pdm09, but at least one in five individuals vaccinated against influenza were protected against presentation to primary care with laboratory-confirmed influenza. This project has received funding from the European Centre for Disease Prevention and Control with in the framework contract ECDC/2018/029. Sí
- Published
- 2022
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