Polioviruses


  • Separate Circulating Vaccine-Derived Polioviruses Confirmed in South Sudan and Madagascar
    In separate and unrelated events, circulating vaccine-derived polioviruses (cVDPVs) have been confirmed in South Sudan and Madagascar, according to the World Health Organization (WHO). In South Sudan, two cases due to cVDPV type 2 (cVDPV2) have been confirmed. The strains ...More
    2 weeks ago Posted in News
  • Two New Cases of Poliovirus in Cameroon are Reported
    In Cameroon, two new wild poliovirus type 1 (WPV1) cases were reported from the East Region, with onset of paralysis on June 26, 2014 and July 9, 2014. Genetic sequencing of these latest isolated viruses confirms continued wild poliovirus circulation, gaps in surveillance ...More
    September 8, 2014 Posted in News
  • Mutated Polio Virus Breaches Vaccine Protection
    Thanks to effective vaccination, polio is considered nearly eradicated. Each year only a few hundred people are stricken worldwide. However, scientists of the University of Bonn, together with colleagues from Gabon, are reporting alarming findings: a mutated virus that was ...More
    August 21, 2014 Posted in News
  • WHO Issues Statement on the International Spread of Wild Poliovirus
    On May 5, 2014 the director-general, Dr. Margaret Chan, declared the international spread of wild poliovirus in 2014 a Public Health Emergency of International Concern (PHEIC) under the International Health Regulations [IHR 2005], issued Temporary Recommendations to reduce ...More
    August 11, 2014 Posted in News
  • A Polio-Free U.S. Thanks to Vaccine Efforts
    Thanks to effective vaccine, the United States has been polio-free since 1979. But poliovirus is still a threat in some countries. Be part of the success story and get your child vaccinated on schedule. Polio, or poliomyelitis, is an infectious viral disease that can strike ...More
    July 21, 2014 Posted in News
  • WHO Issues Update on Polio in Equatorial Guinea
    As of July 16, 2014, Equatorial Guinea has reported a total of 5 wild poliovirus type 1 (WPV1) cases, with onset of paralysis between 28 January 2014 (first case) and 3 May 2014 (most recent case). Genetic sequencing indicated that the cases are linked to the ongoing ...More
    July 17, 2014 Posted in News
  • WHO Issues Update on Polio in Central Africa
    On March 17, 2014, the World Health Organization (WHO) elevated the risk assessment of international spread of polio from central Africa, particularly Cameroon, to very high. A new exportation event from Equatorial Guinea demonstrates that the risk of international spread ...More
    June 25, 2014 Posted in News
  • Brazil Reports Detection of Poliovirus in Sewage
    On June 18, 2014, the National IHR Focal Point for Brazil reported the isolation of wild poliovirus type 1 (WPV1) from sewage samples collected in March 2014 at Viracopos International Airport, in Campinas municipality in the State of São Paulo, Brazil. Virus has ...More
    June 23, 2014 Posted in News
  • WHO Convenes Emergency Committee About International Spread of Wild Poliovirus
    The Emergency Committee of the World Health Organization (WHO) was convened by director-general Margaret Chan under the International Health Regulations (2005) April 28-29, 2014 to discuss the international spread of wild polioviruses. Members of the Emergency Committee and ...More
    May 5, 2014 Posted in News
  • WHO Southeast Asia Region is Certified as Polio-Free
    The World Health Organization (WHO)'s Southeast Asia Region, home to one-quarter of the world’s population, was certified polio-free today by an independent commission under the WHO certification process. This is the fourth of six WHO Regions to be certified, marking ...More
    March 27, 2014 Posted in News
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