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COVID-19 vaccine effectiveness against symptomatic infection with SARS-CoV-2 BA...

Lanièce Delaunay, Charlotte; Martínez-Baz, Iván; Sève, Noémie; Domegan, Lisa; Mazagatos, Clara; Buda, Silke; Meijer, Adam; Kislaya, Irina

Background: Scarce European data in early 2021 suggested lower vaccine effectiveness (VE) against SARS-CoV-2 Omicron lineages than previous variants. Aim: We aimed to estimate primary series (PS) and first booster VE against symptomatic BA.1/BA.2 infection and investigate potential biases. Methods: This European test-negative multicentre study tested primary care patients with acute respiratory symptoms for SAR...

Date: 2024   |   Origin: Repositório Científico do Instituto Nacional de Saúde
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Vaccine effectiveness against COVID-19 hospitalisation in adults (≥ 20 years) d...

Rose, Angela M.C.; Nicolay, Nathalie; Sandonis Martín, Virginia; Mazagatos, Clara; Petrović, Goranka; Baruch, Joaquin; Denayer, Sarah; Seyler, Lucie

Introduction: The I-MOVE-COVID-19 and VEBIS hospital networks have been measuring COVID-19 vaccine effectiveness (VE) in participating European countries since early 2021. Aim: We aimed to measure VE against PCR-confirmed SARS-CoV-2 in patients ≥ 20 years hospitalised with severe acute respiratory infection (SARI) from December 2021 to July 2022 (Omicron-dominant period). Methods: In both networks, 46 hospitals...

Date: 2023   |   Origin: Repositório Científico do Instituto Nacional de Saúde
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