Officials in New York are urging pediatricians and parents to bring patients up to date on polio shots, as evidence suggests the infectious and potentially debilitating poliovirus was present in the state as early as April.

Health officials said they have sent alerts to healthcare providers, hung fliers in houses of worship, grocery stores and summer camps, and talked with community leaders to boost polio vaccination rates in the greater New York City area. Some places including Rockland and Orange counties have polio vaccination rates around 60% among eligible children, compared with a national rate of around 93%, according to federal data.

Polio is particularly insidious, health officials and other public-health experts said, because the majority of cases occur in people who never develop symptoms but can still spread the virus. That silent spread can cause meningitis or paralysis in someone unvaccinated against the disease. 

Wastewater samples in areas including New York City, collected across multiple months, suggest the virus is likely circulating in the area to some degree, experts said. One case has been confirmed, in an unvaccinated young adult who experienced paralysis, officials said.... Read More: WSJ