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[Influenza remains an unpredictable infection]

D K L'vov, A N Slepushkin, S S Iamnikova

    Voprosy Virusologii
    |August 14, 1998
    PubMed
    Summary

    Avian Influenza A (H5N1) virus caused a deadly outbreak in Hong Kong in 1997, primarily spreading from birds to humans. While human-to-human transmission is possible, the outbreak did not escalate into a pandemic.

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    Area of Science:

    • Virology
    • Epidemiology
    • Public Health

    Context:

    • Influenza A (H5N1) virus, previously known only in birds, emerged in humans in Hong Kong in 1997.
    • The outbreak followed intensive surveillance by the WHO and local health authorities.

    Purpose:

    • To report the first isolation of Influenza A (H5N1) from a human case.
    • To describe the epidemiology and virological characteristics of the 1997 Hong Kong outbreak.
    • To assess the pandemic potential of avian Influenza A (H5N1) in humans.

    Summary:

    • Influenza A (H5N1) was isolated from a fatal case in a child, followed by 17 additional human cases, predominantly linked to avian sources.
    • Virological studies confirmed the avian origin of the viruses, possessing all 8 RNA gene segments of avian strains.
    • Most human cases involved children, with fatalities often due to complications like pneumonia.

    Impact:

    • The study highlighted the zoonotic potential of avian influenza viruses and the risk of human infection.
    • It underscored the importance of epidemiological surveillance for early detection and response to novel influenza strains.
    • The findings contributed to understanding the transmission dynamics and pathogenicity of Influenza A (H5N1) in humans, informing pandemic preparedness.

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