Updated September 22, 2022: In July 2022, CDC was notified of a case of polio in an unvaccinated individual from Rockland County, New York, and is working with the New York State Department of Health on their investigation. Public health experts are seeking to understand how and where the individual was infected and to provide protective measures, such as vaccinating under- and unvaccinated individuals. This effort does not change CDC recommendations for polio vaccination. CDC urges everyone at increased risk of exposure to poliovirus who is not fully vaccinated to complete the polio vaccination series as soon as possible. This includes unvaccinated and incompletely vaccinated residents of Rockland, Orange, and Sullivan Counties in New York, where poliovirus has been repeatedly detected in wastewater (sewage) during August 2022. Small updates were made on this page to clarify vaccination recommendations for adults and some other specific populations.

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