Status: no longer poliovirus infected, but at high risk of outbreaks

WHO’s International Travel and Health recommends that all travellers to polio-affected areas be fully vaccinated against polio. Residents (and visitors for more than 4 weeks) from infected areas should receive an additional dose of OPV or inactivated polio vaccine (IPV) within 4 weeks to 12 months of travel.

Polio this week in Guinea and West Africa

  • No circulating vaccine-derived poliovirus type two (cVDPV2) cases have been reported from Guinea in 2016 or 2017. The most recent case was reported from Kankan district with onset of paralysis on 14 December 2015. The total number of cVDPV2 cases for 2015 is seven.
  • While it has been more than a year since the last case had onset of paralysis in Guinea, undetected circulation cannot be ruled out.  A recently-conducted surveillance review in the country found significant improvements to surveillance sensitivity, though some remaining subnational gaps.
  • Critical to long-term success will be to ensure that capacity and infrastructure is maintained to rapidly detect, and respond to, any potential further virus isolates.
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Key at-risk: no longer poliovirus-infected, but at high risk of outbreaks
Outbreak: has stopped indigenous WPV circulation but affected by outbreak of imported WPV or circulating vaccine-derived poliovirus
Endemic: has never stopped indigenous wild poliovirus (WPV) circulation


IHR Classification

Guinea is classified by the International Health Regulations (IHR) as a state no longer infected by wild poliovirus or circulating vaccine-derived poliovirus, but which remains vulnerable to international spread and vulnerable to the emergence and circulation of vaccine-derived poliovirus. Hence it is subject to temporary recommendations as of February 2017.

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