Effectiveness of Inactivated COVID-19 Vaccination Against COVID-19–Related Hospitalization and Severe Outcomes in Adults ≥80 Years During Omicron Circulation in Beijing, China: Retrospective Cohort Study
The first booster vaccination was associated with significantly reduced the risk of COVID-19-related severe outcomes in older inpatients aged ≥80 years during the Omicron-dominant period. Considering the potential selection bias and unmeasured confounders, these estimates may reflect both the VE and the better baseline health status of the vaccinated older individuals.
Authors
- Zhiqiang Cao (ORCID: https://orcid.org/0000-0003-1801-3363)
- Yubo Li (ORCID: https://orcid.org/0000-0003-0455-0969)
- Wei Yao (ORCID: https://orcid.org/0000-0003-4135-5978)
- Luodan Suo
- Juan Li
- Jiang Wu
- Ying Ma
- Dan Zhao
Institutions
- Capital Medical University (CN)
- Beijing Center for Disease Prevention and Control (CN)
Publication Details
- Journal
- JMIR Public Health and Surveillance
- Published
- 2026-03-11
- DOI
- https://doi.org/10.2196/82915
- Primary Topic
- SARS-CoV-2 and COVID-19 Research
- Type
- article
- Field-Weighted Citation Impact
- 0.00