One case of circulating vaccine-derived poliovirus type 2 has been reported this week in Baruten LGA, Kwara state, Nigeria, according to the Global Polio Eradication Initiative.
The case, the first one reported in Nigeria and globally in 2019, had onset of paralysis on 22 January 2019.
The country continues to be affected by two separate cVDPV2 outbreaks, the first centered in Jigawa state with subsequent spread to other states as well as to neighboring Republic of Niger, and the second in Sokoto state.
Vaccine-derived polioviruses (VDPVs) are rare strains of poliovirus that have genetically mutated from the strain contained in the oral polio vaccine.
Nigeria is one of three remaining polio endemic countries (along with Pakistan and Afghanistan) and has not seen a wild poliovirus type 1 (WPV1) since Aug. 2016.
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