Summary of new polioviruses this week, cases and positive environmental isolates:
- Pakistan: 41 WPV1-positive environmental samples
- Chad: one cVDPV2 case
- Nigeria: one cVDPV2 case
- Papua New Guinea: six cVDPV2-positive environmental samples
- Sudan: one cVDPV2-positive environmental sample
- Yemen: seven cVDPV2 cases
