New York health officials say they've detected polio in city wastewater, and they're worried this means the virus that causes the disease is circulating in the city. 

KCBS Radio news reporter Liz Saint John has more.

<p>New York health officials say they've detected polio in city wastewater, and they're worried this means the virus that causes the disease is circulating in the city. </p>
<p>KCBS Radio news reporter Liz Saint John has more.</p>

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