Real-World Effectiveness of Influenza Vaccination Against Medically Attended Influenza and Severe Outcomes Among Older Adults in Yichang, China: A Multi-Season Population-Based Cohort Study

Background/Objectives: Real-world evidence on influenza vaccine effectiveness (VE) against severe outcomes among older adults in China remains limited. We evaluated influenza vaccination against medically attended influenza, influenza hospitalization, and influenza-related intensive care unit (ICU) admission among adults aged ≥60 years in Yichang, China.