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Imported wild poliovirus causing poliomyelitis--Bulgaria, 2001.

    MMWR. Morbidity and Mortality Weekly Report
    |March 21, 2002
    PubMed
    Summary
    This summary is machine-generated.

    An unvaccinated child in Bulgaria contracted wild poliovirus type 1, linked to a strain from India. Prompt public health response, including mass vaccinations, was crucial to control the polio outbreak.

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    Area of Science:

    • Epidemiology
    • Virology
    • Public Health

    Background:

    • Wild poliovirus type 1 outbreaks pose a significant global health threat, particularly in regions with suboptimal vaccination coverage.
    • Maintaining high routine vaccination coverage and robust surveillance systems are critical for preventing poliovirus importation and spread.

    Observation:

    • Three cases of poliomyelitis, caused by wild poliovirus type 1, were confirmed in unvaccinated Roma children in Bulgaria in March-May 2001.
    • The isolated viruses were closely related to a strain previously identified in India, suggesting international transmission.

    Findings:

    • The outbreak was successfully contained through intensified acute flaccid paralysis (AFP) surveillance and mass vaccination campaigns implemented by the Bulgarian Ministry of Health.
    • Contact investigations and screening of high-risk children were integral components of the outbreak response.

    Implications:

    • This event underscores the importance of sustained high vaccination rates and effective surveillance for early detection and rapid response to poliovirus importations.
    • Certification-standard AFP surveillance is essential for polio-free countries to rapidly detect and prevent the re-establishment of poliovirus transmission.