This paper is in the following e-collection/theme issue:

COVID-19 Vaccination (185) Infectious Diseases (non-STD/STI) (1749) Theme Issue: Novel Coronavirus (COVID-19) Outbreak Rapid Reports (1545) Hygiene and Infection Prevention (381) Outbreak and Pandemic Preparedness and Management (1844) Health Services Research and Health Care Utilization in Older Patients (149) Prevention and Health Promotion (1456)

Published on in Vol 12 (2026)

Preprints (earlier versions) of this paper are available at https://preprints.jmir.org/preprint/82915, first published .
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

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

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

Authors of this article:

Dan Zhao1, 2, 3 Author Orcid Image ;   Ying Ma1, 2, 3 Author Orcid Image ;   Juan Li1, 2, 3 Author Orcid Image ;   Xiaomei Li1, 2, 3 Author Orcid Image ;   Zhiqiang Cao1, 2, 3 Author Orcid Image ;   Wei Yao1 Author Orcid Image ;   Jiang Wu1, 2 Author Orcid Image ;   Luodan Suo1, 2, 3 Author Orcid Image
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