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Influenza surveillance

M Pereira, F A Assaad, P J Delon

    Bulletin of the World Health Organization
    |January 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

    Global influenza surveillance monitors disease impact and anticipates epidemics through virus analysis. The World Health Organization (WHO) coordinates national centers for epidemiological and laboratory data collection, guiding vaccine composition recommendations.

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    Area of Science:

    • Epidemiology
    • Virology
    • Public Health

    Background:

    • Influenza surveillance aims to quantify disease burden (morbidity, mortality) and predict future outbreaks.
    • The World Health Organization (WHO) coordinates a global network of 98 national influenza centers and 2 collaborating centers.

    Purpose of the Study:

    • To outline the objectives and methods of global influenza surveillance.
    • To highlight the importance of both epidemiological and laboratory data in understanding influenza.
    • To inform vaccine composition recommendations based on circulating influenza strains.

    Main Methods:

    • Collection and analysis of epidemiological data (morbidity, mortality, absenteeism).
    • Collection and analysis of influenza viruses for antigenic characterization.

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  • Monitoring of antigenic "drift" in influenza A (H3N2) and influenza B viruses.

    • Main Results:

    • Identification of key influenza A (H3N2) variants causing epidemics (A/England/42/72, A/Port Chalmers/1/73, A/Victoria/3/75).
    • Detection of antigenic "drift" in influenza B virus (B/Hong Kong/5/72).

    Conclusions:

    • Continuous surveillance is crucial for tracking influenza evolution and impact.
    • Global collaboration is essential for effective influenza monitoring and response.
    • Data from surveillance inform annual vaccine composition recommendations to address circulating strains.