Real-world effectiveness of the influenza vaccine among school-aged children in Shenzhen, China, 2024-2025 season: A test-negative design study.
OBJECTIVE To comprehensively evaluate the real-world effectiveness of the influenza vaccine among school-aged children across a dual-peak season, specifically examining subtype-specific protection, age variations, durability of protection over time, and the impact of repeated prior-season vaccination. METHODS A test-...