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Chicago Sun-Times
Chicago Sun-Times
National
Mike Stobbe | AP

Sewage to be tested for polio in 2 more places: Philadelphia and Oakland County, Mich.

Ryan Dupont, a Utah State University professor, collects sewage samples from dorms at the school to test for COVID-19. Such wastewater testing now is being tried to spot polio. (AP file)

Philadelphia and Oakland County, Michigan, are joining the small list of places that are looking for signs of polio infections in sewage.

The federal Centers for Disease Control and Prevention said the communities will test for polio in sewage for at least four months.

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