Local, State, and National Efforts That Support Influenza Surveillance—From the Ground Up - Summary - MDSpire

Local, State, and National Efforts That Support Influenza Surveillance—From the Ground Up

  • By

  • Eric J. Chow

  • Tigran Avoundjian

  • Laura P. Newman

  • June 17, 2026

  • 0 min

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Objective:

To provide an overview of influenza surveillance efforts in the US.

Approach:
    Key Findings:
    • Influenza activity peaked in late December 2025, with A(H3N2) predominating.
    • Hospitalization rates were among the highest in the last 15 years, primarily due to A(H3N2) infections.
    • Vaccine effectiveness was estimated at 47% in children and 26% in adults against hospitalizations.
    Interpretation:

    The 2025-2026 influenza season was characterized by significant epidemiological changes, with high hospitalization rates and notable vaccine effectiveness challenges.

    Limitations:
    • Data may not fully represent all geographic areas due to varying participation in surveillance networks.
    • Potential biases in hospitalization reporting and vaccine effectiveness estimates.
    Conclusion:

    The ongoing evolution of influenza epidemiology necessitates robust surveillance systems to adapt to emerging trends and challenges.

    Sources:

Original Source(s)

Local, State, and National Efforts That Support Influenza Surveillance—From the Ground Up

  • by Eric J. Chow, Tigran Avoundjian, Laura P. Newman

  • June 17, 2026

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