Study Analyzes Kindergarten Measles Vaccination Gaps Across America

As of April 2025, there have been 16 measles outbreaks in the United States, a number that has jumped significantly over the past few years. A new study from PA Requirements shows this has a connection to vaccination gaps. Kindergarten vaccinations help protect citizens against diseases like measles and contribute to our population achieving herd immunity, which eradicates the threat of the disease. However, the team’s study reveals that a combination of policy, vaccine access, and community factors is hindering our progress toward this goal.

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The team found that these states had the highest percentage of children not vaccinated for measles:

• Idaho: 20.4%
• Alaska: 15.7%
• Wisconsin: 15.2%
• Minnesota: 13.0%
• Florida: 11.9%
• Oklahoma: 11.7%
• Colorado: 11.7%
• Utah: 11.2%
• Iowa: 10.9%
• Ohio: 10.8%

It can be useful to compare these numbers to the states with the lowest rates of unvaccinated children:

• West Virginia: 1.7%
• New York: 2.3%
• Connecticut: 2.3%
• Mississippi: 2.5%
• Maine: 2.5%
• Rhode Island: 2.9%
• Maryland: 3.4%
• Massachusetts: 3.7%
• California: 3.8%

We can observe some interesting regional patterns by examining the map, such as lower vaccination rates in the Midwest and Southwest.

Among the states with high rates of vaccination, we find that these five states don’t allow non-medical vaccination exemptions: Maine, New York, West Virginia, Connecticut, and California. It’s no surprise that stricter policies lead to a greater number of vaccinations. Among states with lower rates, we find more relaxed laws that allow for greater exemptions on the basis of religion, philosophy, and other personal reasons. Comparing each state to its neighbors reveals patterns and trends that might imply cultural differences affecting vaccination rates in different regions. We can look for locations with a high prevalence of religions that outlaw vaccines to identify reasons for the numbers on the map. Check the numbers on the states with the largest cities, and you might find stricter vaccination laws there to help prevent disease spread in population-dense areas.

There’s no doubt that state policies correlate directly with vaccination rates when we look at the numbers presented on the team’s graphic. Many states require certain vaccinations, like measles, in order to enroll in public school. These laws and requirements also directly impact vaccination rates. Looking at insurance costs and access to vaccine clinics in rural areas may also reveal why some areas have more unvaccinated children than others. Some states have created initiatives to encourage vaccination and provide education, leading to higher vaccination rates.

Overall, studies like these greatly benefit public health by increasing awareness and education about diseases like measles. People who shy away from vaccines often find them untrustworthy. The only way to convince them otherwise is to answer their questions and present them with transparent data that’s easy to understand, just like the information shown in this graphic, regarding the risks associated with declining vaccines. These studies provide policymakers, parents, and public health officials with more information to make informed decisions for the health of their children and communities.