Effectiveness of influenza vaccination in preventing influenza in primary care,Navarre, Spain, 2021/22 |
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| Authors: | Ivá n Martí nez-Baz,Itziar Casado,Ana Miqueleiz,Ana Navascué s,Francisco Pozo,Camino Trobajo-Sanmartí n,Esther Albé niz,Fernando Elí a,Cristina Burgui,Miguel Ferná ndez-Huerta,Carmen Ezpeleta,Jesú s Castilla |
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| Affiliation: | 1.Instituto de Salud Pública de Navarra, Pamplona, Spain; 2.CIBER Epidemiología y Salud Pública (CIBERESP), Spain; 3.Navarre Institute for Health Research (IdiSNA), Pamplona, Spain; 4.Clinical Microbiology Department, Hospital Universitario de Navarra, Pamplona, Spain; 5.National Centre for Microbiology, Instituto de Salud Carlos III, Madrid, Spain; 6.Gerencia de Atención Primaria, Servicio Navarro de Salud-Osasunbidea, Pamplona, Spain |
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| Abstract: | ![]()
Compared with individuals unvaccinated in the current and three previous influenza seasons, in 2021/22, influenza vaccine effectiveness at primary care level was 37% (95% CI: 16 to 52) for current season vaccination, regardless of previous doses, and 35% (95% CI: −3 to 45) for only previous seasons vaccination. Against influenza A(H3N2), estimates were 39% (95% CI: 16 to 55) and 24% (95% CI: −8 to 47) suggesting moderate effectiveness of current season vaccination and possible remaining effect of prior vaccinations. |
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| Keywords: | influenza influenza vaccine acute respiratory infection case-control study vaccine effectiveness repeated vaccination |
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