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Circulating Vaccine-derived Poliovirus Type 2 – Originated In Nigeria And Now In - Science/Technology - Nairaland

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Circulating Vaccine-derived Poliovirus Type 2 – Originated In Nigeria And Now In by Johnpotter660: 7:52pm On Jun 12, 2019
On 23 May 2019, WHO received notification through the Global Polio Laboratory Network (GPLN) of the detection of circulating vaccine-derived poliovirus type 2 (cVDPV2) from an environmental sample collected on 20 April 2019 in a hospital in Northern Cameroon which borders Borno state in Nigeria and Chad. In this region, the vaccine coverage in 2018 for inactivated poliovirus vaccine (IPV1) and oral poliovirus vaccine (OPV3) was 73% and 72% respectively. The virus was detected in an environmental sample only – no associated cases of paralysis have been detected so far.

Genetic sequencing confirms that the isolate is associated with the ongoing cVDPV2 outbreak in neighboring Nigeria which originated in Jigawa state and spread to other areas of Nigeria, as well as internationally to the Republic of Niger in 2018.

Public health response
The Ministry of Health and local health authorities have been involved in the response to the cVDPV2 outbreak in Nigeria and across the the Lake Chad sub region (Chad, Cameroon, Niger and Nigeria) by providing monovalent type 2 oral polio vaccine (mOPV2). A thorough investigation of the incident is ongoing with the support of partners in the Global Polio Eradication Initiative (GPEI) and includes assessing the extent of circulation of this strain, identifying sub-national immunity gaps and supporting efforts to strengthen sub-national surveillance sensitivity.

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https://www (dot) africansciencepost (dot) com/2019/06/09/circulating-vaccine-derived-poliovirus-type-2-originated-in-nigeria-and-now-in-cameroon/

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