The Yobe State Government in Nigeria’s north-east says it has recorded four new cases of polio in three Local Government Areas (LGAs), three years after the state was declared polio-free.
The state government did not, however, say if the virus was the original poliovirus or the vaccine-derived poliovirus type 2 (cVDPV2) which is a rare case that occurs in vaccinated individuals.
Nigeria was declared polio-free in 2020 by the World Health Organisation, but hundreds of cases of the…
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