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Early COVID‐19 XBB.1.5 Vaccine Effectiveness Against Hospitalisation Among Adul...

Antunes, Liliana; Mazagatos, Clara; Martínez‐Baz, Iván; Naesens, Reinout; Borg, Maria‐Louise; Petrović, Goranka; Fatukasi, Terra; Jancoriene, Ligita

We conducted a multicentre test-negative case–control study covering the period from October 2023 to January 2024 among adult patients aged ≥18 years hospitalised with severe acute respiratory infection in Europe. We provide early estimates of the effectiveness of the newly adapted XBB.1.5 COVID-19 vaccines against PCR-confirmed SARS-CoV-2 hospitalisation. Vaccine effectiveness was 49% overall, ranging between ...


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