Summary of new polioviruses this week, cases and positive environmental isolates:
- Pakistan: three WPV1 cases and 19 WPV1-positive environmental samples
- Chad: two cVDPV2 cases
- Niger: one cVDPV2-positive environmental sample
- Nigeria: seven cVDPV2 cases
- Senegal: one cVDPV2-positive environmental sample
