Eurosurv. Effectiveness of COVID-19 vaccines in preventing SARS-CoV-2 infection and hospitalisation, Navarre, Spain, January to April 2021

[tetano]

• Iván Martínez-Baz[SUP]1,2,3[/SUP] , Ana Miqueleiz[SUP]3,4[/SUP] , Itziar Casado[SUP]1,2,3[/SUP] , Ana Navascués[SUP]3,4[/SUP] , Camino Trobajo-Sanmartín[SUP]3,4[/SUP] , Cristina Burgui[SUP]1,2,3[/SUP] , Marcela Guevara[SUP]1,2,3[/SUP] , Carmen Ezpeleta[SUP]3,4[/SUP] , Jesús Castilla[SUP]1,2,3[/SUP] , Working Group for the Study of COVID-19 in Navarra[SUP]5 [/SUP]

COVID-19 vaccine effectiveness was evaluated in close contacts of cases diagnosed during January–April 2021. Among 20,961 contacts, 7,240 SARS-CoV-2 infections were confirmed, with 5,467 being symptomatic and 559 leading to hospitalisations. Non-brand-specific one and two dose vaccine effectiveness were respectively, 35% (95% confidence interval (CI): 25 to 44) and 66% (95% CI: 57 to 74) against infections, 42% (95% CI: 31 to 52) and 82% (95% CI: 74 to 88) against symptomatic infection, and 72% (95% CI: 47 to 85) and 95% (95% CI: 62 to 99) against COVID-19 hospitalisation. The second dose significantly increased effectiveness. Findings support continuing complete vaccination.

full article


https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2021.26.21.2100438#html_fulltext

 

[bertrand789]

Effectiveness is the capability of producing a desired result or the ability to produce desired output. When something is deemed effective, it means it has an intended or expected outcome, or produces a deep, vivid impression

https://en.wikipedia.org/wiki/Effectiveness

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