Polio this week as of 28 May 2025

Summary of new polioviruses this week, cases and positive environmental isolates:

• Afghanistan: five WPV1-positive environmental samples

• Pakistan: two WPV1 cases

• Algeria: one cVDPV2-positive environmental sample

• Germany: one cVDPV2-positive environmental sample

• Guinea: one cVDPV3 case

• Nigeria: one cVDPV2-positive environmental sample