Vaccine effectiveness varied across different age demographics and virus strains, offering the highest protection against influenza B and among children and adolescents during the 2024-2025 season, ...
A meta-analysis indicates HD-IIV is superior to SD-IIV for reducing hospitalizations in adults aged 65 years and older.
Children and adolescents who die from influenza-related illness are less likely to have received the vaccine for the current season, per an analysis of pediatric deaths over eight seasons in the US.