Effectiveness of influenza vaccination in preventing influenza in primary care, Navarre, Spain, 2021/22

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...

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Published inEuro surveillance : bulletin européen sur les maladies transmissibles Vol. 27; no. 26; p. 8
Main Authors Martínez-Baz, Iván, Casado, Itziar, Miqueleiz, Ana, Navascués, Ana, Pozo, Francisco, Trobajo-Sanmartín, Camino, Albéniz, Esther, Elía, Fernando, Burgui, Cristina, Fernández-Huerta, Miguel, Ezpeleta, Carmen, Castilla, Jesús
Format Journal Article
LanguageEnglish
Published Saint-Maurice Centre Europeen pour la Surveillance Epidemiologique du SIDA (European Centre for the Epidemiological Monitoring of AIDS) 30.06.2022
European Centre for Disease Prevention and Control (ECDC)
Subjects
Disease prevention
Immunization
Influenza
Primary care
Rapid Communication
Vaccines
Navarre Spain
Spain
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Summary: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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Correspondence: Jesús Castilla (jcastilc@navarra.es)
ISSN:1560-7917
1025-496X
1560-7917
DOI:10.2807/1560-7917.ES.2022.27.26.2200488