How to find your polio vaccination records —which is harder in some states than others

After poliovirus was found in wastewater in three New York counties, some people have tried to verify that they've gotten all the recommended shots.

Most Americans were vaccinated in early childhood. Kindergarten vaccination rates for polio have hovered around 95% since at least the 2011-12 school year.

But there's no federal database of vaccination records. So if you’re unsure whether you were fully vaccinated against polio, how you retrieve your records depends on where you got your immunizations.

The Centers for Disease Control and Prevention suggests asking parents or caregivers, doctors or public health clinics you visited as a child, or previous employers that required immunizations. Schools may also keep records for a couple of years after students graduate.