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Update: influenza activity--United States, 2004-05 season

    MMWR. Morbidity and Mortality Weekly Report
    |April 9, 2005
    PubMed

    Insights

    This report details US influenza activity from October 2004 to March 2005, noting moderate national levels peaking in February. It also outlines the 2005-06 influenza vaccine composition.

    Area of Science:

    • Epidemiology
    • Public Health
    • Virology

    Background:

    • Influenza surveillance is crucial for monitoring disease activity and informing public health interventions.
    • Understanding regional variations in influenza activity helps tailor prevention strategies.

    Purpose of the Study:

    • To summarize influenza activity in the United States for the 2004-2005 season.
    • To update previous surveillance reports.
    • To describe the composition of the 2005-2006 influenza vaccine.

    Main Methods:

    • Utilized data from the seven components of the Centers for Disease Control and Prevention (CDC) Influenza Surveillance system.
    • Collected and analyzed influenza activity data from October 3, 2004, to March 26, 2005.

    Main Results:

    • Overall influenza activity in the United States was moderate during the study period.
    • Influenza activity demonstrated regional variations across the country.
    • National influenza activity reached its peak in early February, based on preliminary data.

    Conclusions:

    • The 2004-2005 influenza season was characterized by moderate, regionally variable activity peaking in early February.
    • The findings underscore the importance of ongoing influenza surveillance.
    • Information on vaccine composition is vital for future preparedness.

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