COVID-19 mRNA vaccine effectiveness (second and first booster dose) against hospitalisation and death during Omicron BA.5 circulation: cohort study based on electronic health records, Portugal, May to July 2022

Kislaya, Irina; Machado, Ausenda; Magalhães, Sarah; Paula Rodrigues, Ana; Franco, Rafael; Pinto Leite, Pedro; Matias Dias, Carlos; Nunes, Baltazar

doi:10.2807/1560-7917.es.2022.27.37.2200697

Public

COVID-19 mRNA vaccine effectiveness (second and first booster dose) against hospitalisation and death during Omicron BA.5 circulation: cohort study based on electronic health records, Portugal, May to July 2022

Published in Eurosurveillance • Sep 15, 2022

Authors:

Irina Kislaya

Ausenda Machado

Sarah Magalhães

Abstract

We measured vaccine effectiveness (VE) against COVID-19-related severe outcomes in elderly people in Portugal between May and July 2022. In ≥ 80 year-olds, the second booster dose VE was 81% (95% CI: 75-85) and 82% (95% CI: 77-85), respectively, against COVID-19-related hospitalisation and death. Th...

Subject

Coronavirus disease 2019 (COVID-19)

Booster (rocketry)

Health records

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