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Abstract

We estimated vaccine effectiveness (VE) of SARS-CoV-2 Omicron XBB.1.5 vaccination against self-reported infection between 9 October 2023 and 9 January 2024 in 23,895 XBB.1.5 vaccine-eligible adults who had previously received at least one booster. VE was 41% (95% CI: 23–55) in 18–59-year-olds and 50% (95% CI: 44–56) in 60–85-year-olds. Sequencing data suggest lower protection against the BA.2.86 (including JN.1) variant from recent prior infection (OR = 2.8; 95% CI:1.2–6.5) and, not statistically significant, from XBB.1.5 vaccination (OR = 1.5; 95% CI:0.8–2.6).

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/content/10.2807/1560-7917.ES.2024.29.10.2400109
2024-03-07
2024-11-17
http://instance.metastore.ingenta.com/content/10.2807/1560-7917.ES.2024.29.10.2400109
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