Nigeria battles vaccine-derived poliovirus years after polio-free certification

Despite having achieved the wild polio-free certification, Nigeria is still battling the circulating vaccine-derived poliovirus Type 2, Saturday PUNCH has learnt. The last case of wild poliovirus in the country was reported in Borno State in August 2016 and on August 25, 2020, Nigeria, was certified wild polio-free, culminating in a wild polio-free African region.

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