Summary of new polioviruses this week, cases and positive environmental isolates:
- Afghanistan: six WPV1-positive environmental samples
- Pakistan: one WPV1 case and one WPV1-positive environmental sample
- Chad: five cVDPV2 cases and one cVDPV2-positive environmental sample
- Nigeria: one cVDPV2 case
- Poland: one cVDPV2-positive environmental sample
- South Sudan: one cVDPV2-positive environmental sample
