Nigeria reported 1,027 cases of the circulating vaccine-derived poliovirus type 2 in 2021, The PUNCH reports. This is contained in the 2021 annual report released by the World Health Organisation. The WHO said 2021 witnessed a resurgence in the incidence of cVDPV2 due to suboptimal population immunity. The report also showed that 7,770 Acute Flaccid Paralysis cases were reported in 2021 against 6,324 in 2020 and 7,509 in 2019. View More