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  U.S. Department of Health and Human Services | National Institutes of Health

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A map of the world in 1988 and 2020 showing the countries in dark purple where polio was still spreading for each year

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A map showing the progress between 1988 and 2020 in the eradication of polio worldwide

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Centers for Disease Control and Prevention (CDC)



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1979

Polio eradicated in the United States.

In 1979, polio was eradicated in the United States thanks to vaccination. This means that there is no year-round transmission of polio and no cases of polio have originated in the United States since 1979. The polio virus can still be brought into the country by travelers; the last time this happened was in 1993.

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