JUL 26, 2026 · JOURNAL ARTICLE
Adapted XBB.1.5 vaccine effectiveness against severe COVID-19 outcomes among immunocompromised persons in 2023-24 in six European countries: a VEBIS-EHR network study.
Expert Review of Vaccines
Multi-country retrospective cohort study with confounder-adjusted hazard ratios and meta-analysis pooling, demonstrating moderate vaccine effectiveness against severe outcomes in a vulnerable population, though protection wanes over time.
Reported
Vaccine effectiveness against hos…52%
95% CI for VE against hospitaliza…41 to 60
Vaccine effectiveness against dea…75%