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Vaccination coverage has declined nationwide, with most U.S. counties failing to meet the 95% immunity threshold.

In Iowa, only 10 of the state's 99 counties currently meet or exceed the recommended 95% MMR vaccination rate for kindergartners.

Roughly half of Iowa's counties have vaccination rates below 90%, significantly increasing the risk of measles outbreaks.

MMR vaccination coverage has declined in the United States in recent years, with at least 75% of counties nationwide failing to meet the immunity threshold needed to prevent widespread outbreaks, according to new research by Johns Hopkins University and USA TODAY.

The MMR vaccine protects from measles, mumps and rubella. Only 10 of Iowa's 99 counties are at or exceed the MMR vaccination coverage rate of

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