<i>Notes from the Field</i>: Detection of Vaccine-Derived Poliovirus Type 2 in Wastewater — Five European Countries, September–December 2024

Poliovirus is highly contagious and can cause flu-like illness and in rare cases, acute flaccid paralysis (AFP) and, since 1988, has been targeted by all countries for eradication.Vaccinederived polioviruses (VDPVs) are rare pathogenic strains of poliovirus that can emerge through genetic mutations in the oral polio vaccine strain, from prolonged circulation in underimmunized populations (1).The World Health Organization (WHO) European Region has been free from endemic polio since 2002, but importation of VDPVs from other settings can lead to local circulating VDPVs (cVDPVs) if they are introduced into undervaccinated communities.*Circulation of type 2 cVDPV (cVDPV2) occurred in the United Kingdom in 2022, linked to transmission in Israel, United States, and * The target immunization coverage for polio is 90% of children receiving 3 doses of polio-containing vaccine by age 1 year.