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Polio--new challenges in 2006.

Samuel L Katz1

  • 1Duke University Medical School, Division of Infectious Diseases, Department of Pediatrics, Erwin Road, Room T0915, Duke Children's Center, Box 2925, Durham, NC 27710, USA. katz0004@mc.duke.edu

Journal of Clinical Virology : the Official Publication of the Pan American Society for Clinical Virology
|May 9, 2006
PubMed
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The global Polio Eradication Program faces challenges from virus spread and vaccine-derived polioviruses (cVDPV). Data from 2004-2005 show ongoing cases, with Nigeria posing a significant hurdle to polio elimination.

Area of Science:

  • Public Health
  • Infectious Disease Epidemiology
  • Virology

Background:

  • The Polio Eradication Program has faced significant setbacks in recent years.
  • Polio virus transmission has expanded from Nigeria across Africa, the Middle East, and into Indonesia.
  • India remains a source of virus exportation, albeit to a lesser extent.

Purpose of the Study:

  • To present data on paralytic polio cases reported to the WHO in 2004 and 2005.
  • To discuss newly identified obstacles to polio eradication, including circulating vaccine-derived polioviruses (cVDPV) and those from immune-deficient patients (iVDPV).
  • To consider strategies for maintaining polio-free status post-eradication.

Main Methods:

  • Data compilation of paralytic polio cases reported to the World Health Organization (WHO).

Related Experiment Videos

  • Analysis of geographical distribution and temporal trends of polio cases.
  • Review of challenges including cVDPV and iVDPV.

    • Main Results:

    • Poliovirus spread extensively across Africa, the Middle East, and Indonesia between 2004 and 2005.
    • India showed a reduced but continued exportation of the virus.
    • Nigeria was identified as a primary challenge for polio elimination in 2006.
    • Circulating vaccine-derived polioviruses (cVDPV) and immDeficient patient-derived polioviruses (iVDPV) emerged as new threats.

    Conclusions:

    • WHO remains optimistic about polio elimination in most affected countries by 2006, with the exception of Nigeria.
    • The emergence of cVDPV and iVDPV presents novel challenges to achieving global polio eradication.
    • Planning for sustained polio-free status is crucial as the program nears its endgame.