ABUJA, NIGERIA — Nigeria’s difficult victory over polio faces a challenge as the poliovirus type 2 variant reemerges and the nation considers new measures to tackle the outbreak. Nigeria eradicated wild polio in 2020, but more than 50 cases of the poliovirus type 2 variant were reported between January and May. Authorities and global partners met … continue reading -> “New polio strain threatens setback to eradication in Nigeria”