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

[tetano]

• Iván Martínez-Baz[SUP]1,2,3[/SUP] , Itziar Casado[SUP]1,2,3[/SUP] , Ana Miqueleiz[SUP]3,4[/SUP] , Ana Navascués[SUP]3,4[/SUP] , Francisco Pozo[SUP]2,5[/SUP] , Camino Trobajo-Sanmartín[SUP]1,2,3[/SUP] , Esther Albéniz[SUP]3,6[/SUP] , Fernando Elía[SUP]3,6[/SUP] , Cristina Burgui[SUP]1,2,3[/SUP] , Miguel Fernández-Huerta[SUP]3,4[/SUP] , Carmen Ezpeleta[SUP]3,4[/SUP] , Jesús Castilla[SUP]1,2,3[/SUP]

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

https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2022.27.26.2200488#html_fulltext