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Sewersheds with detections of poliovirus type 2 genetically linked to the virus isolated from a paralytic polio patient, March 9-October 11, 2022

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Sullivan (A), Orange (B), Rockland (C), Kings and Queens (D), and Nassau (E) counties, New York. Abbreviation: PV2 = poliovirus type 2. Sampling sites are sewersheds defined as the community area served by a wastewater collection system. Sub-sewersheds are upstream sampling locations within a larger sewershed. In July 2022, paralytic poliomyelitis resulting from infection with vaccine-derived PV2 was confirmed in an unvaccinated adult resident of Rockland County, New York. A single large-volume sample from a sub-sewershed serving parts of Kings and Queens counties tested positive for the PV2 genetically linked to the virus isolated from the patient. (Source: Ryerson AB, Lang D, Alazawi MA, et al. Wastewater testing and detection of poliovirus type 2 genetically linked to virus isolated from a paralytic polio case - New York, March 9-October 11, 2022. MMWR Morb Mortal Wkly Rep 2022;71[44]:1418-24. Public domain.)