Estimation of COVID-19 vaccine effectiveness against hospitalisation in individuals aged ≥ 65 years using electronic health registries; a pilot study in four EU/EEA countries, October 2021 to March 2022.

Sentís, Alexis; Kislaya, Irina; Nicolay, Nathalie; Meijerink, Hinta; Starrfelt, Jostein; Martínez-Baz, Iván; Castilla, Jesús; Nielsen, Katrine Finderup; Hansen, Christian Holm; Emborg, Hanne-Dorthe; +6 more... Nardone, Anthony; Derrough, Tarik; Valenciano, Marta; Nunes, Baltazar; Monge, Susana; VEBIS-Lot4 working group; (2022) Estimation of COVID-19 vaccine effectiveness against hospitalisation in individuals aged ≥ 65 years using electronic health registries; a pilot study in four EU/EEA countries, October 2021 to March 2022. Eurosurveillance, 27 (30). ISSN 1560-7917 DOI: https://doi.org/10.2807/1560-7917.ES.2022.27.30.2200551

Abstract

By employing a common protocol and data from electronic health registries in Denmark, Navarre (Spain), Norway and Portugal, we estimated vaccine effectiveness (VE) against hospitalisation due to COVID-19 in individuals aged ≥ 65 years old, without previous documented infection, between October 2021 and March 2022. VE was higher in 65-79-year-olds compared with ≥ 80-year-olds and in those who received a booster compared with those who were primary vaccinated. VE remained high (ca 80%) between ≥ 12 and < 24 weeks after the first booster administration, and after Omicron became dominant.

Additional Information

Item Type	Article
Faculty and Department	Faculty of Epidemiology and Population Health > Dept of Infectious Disease Epidemiology
Research Centre	Covid-19 Research
PubMed ID	35904059
Elements ID	182270