COVID-19 Vaccine Effectiveness of Booster Doses Against Delta and Omicron Variants Over Follow-up Times Using Longitudinal Meta-analysis.

J Res Health Sci · 2024 · PMC11492529 · PMID 39431651

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a decreasing trendno p-value reported

For example, a multivariate meta-analysis showed a decreasing trend of 58.7% (95% CI: 53.5–63.3) for the VE against the Omicron variant after four weeks, which declined to 19.1% (95% CI: 6.0–30.3) after 25 weeks after the booster dose.

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