Seasonal Influenza Activity, Vaccination Rates, and Pediatric Influenza Mortality, Massachusetts 2024-2025

Area of Science:

• Public Health
• Epidemiology
• Infectious Diseases

Background:

• Influenza poses a significant public health threat annually.
• Understanding seasonal trends and vaccination impact is crucial for effective interventions.
• Pediatric mortality during influenza seasons requires targeted surveillance.

Purpose of the Study:

• To analyze influenza activity, vaccination coverage, and pediatric mortality in Massachusetts for the 2024-2025 season.
• To inform public health strategies for the current influenza season.
• To assess the role of vaccination in preventing pediatric influenza deaths.

Main Methods:

• Utilized public health surveillance data from Massachusetts.
• Tracked influenza-like illness (ILI), emergency department visits, and hospitalizations.
• Analyzed vaccination coverage in pediatric patients and older adults, and reviewed pediatric mortality data.

Main Results:

• Influenza activity was elevated, indicated by increased ILI, emergency department visits, and hospitalizations.
• Pediatric vaccination coverage was low, while coverage remained high for individuals aged 65 and older.
• Ten pediatric deaths were reported; 7 had pre-existing conditions, and 8 of the 10 deceased children were unvaccinated.

Conclusions:

• Elevated influenza activity necessitates robust public health responses.
• Low pediatric vaccination coverage is a critical concern.
• Influenza vaccination is likely a key factor in preventing pediatric mortality, especially in vulnerable children.