What the National Numbers Show
Every summer the same figure circulates: kindergarten vaccination coverage has slipped below the level needed to stop measles spreading. It is accurate, and it is close to useless for deciding whether your own child's school is a risk.
The most recent CDC data, covering the 2024 to 2025 school year, shows coverage among US kindergartners declined for every reported vaccine compared with the year before, ranging from 92.1 percent for DTaP to 92.5 percent for both MMR and polio. Coverage with MMR, DTaP, polio, and varicella fell in more than half of states.
Roughly 286,000 kindergartners attended school that year without documentation of completing the MMR series.
Exemptions moved in the same direction. Exemptions from one or more vaccines rose to 3.6 percent nationally from 3.3 percent, increasing in 36 states and the District of Columbia, with 17 states reporting exemption rates above 5 percent. About 138,000 kindergartners held an exemption from at least one vaccine.
Public health guidance generally puts the threshold for community protection against measles at 95 percent coverage. The national figure sits about two and a half points below it.
Why a State Average Is the Wrong Number
Averages are built to hide exactly the thing a parent wants to know, and with vaccination coverage the hiding is severe.
A state at 94 percent could be uniformly at 94 percent, or it could be a collection of districts mostly at 98 with a handful at 70. Those are radically different situations. Measles spreads through susceptible clusters, not through statistical averages, so a single school where coverage has fallen into the seventies can sustain an outbreak inside a state that looks fine on a map.
The CDC says this plainly on its own measles pages, noting that at local levels coverage rates may vary considerably and that "pockets of unvaccinated people can exist in states with high vaccination coverage."
This year's outbreak pattern is consistent with that. The United States recorded 2,318 measles cases through late July, the highest annual count since 1991, with 93 percent of cases in people who were unvaccinated or whose status was unknown. Outbreaks have concentrated in specific communities rather than spreading evenly across states.
So the question worth asking is not what your state's rate is. It is what your district's rate is, and whether anyone publishes it.
What CDC Publishes and What It Does Not
Here is the gap, and it is worth stating precisely because it is easy to assume the data exists somewhere at the federal level.
CDC's SchoolVaxView is the national source for kindergarten vaccination coverage and exemptions. Its own description of what it offers is specific: national and state-level estimates. It does not publish county-level or school-district-level figures.
The data also arrives with a caveat CDC states directly, that "data collection methodology differs by state." Some states assess every kindergartner, others survey a sample, and definitions of what counts as complete or exempt are not uniform. That makes state-to-state comparisons rougher than a ranked list implies.
There is a timing limitation as well. The most recent release covers the 2024 to 2025 school year and was published in mid-2025. Families enrolling children this August are working from figures roughly a year old, and the current school year's data will not be available until well after the year begins.
None of this is a failure of effort. Assembling comparable data from more than 50 reporting jurisdictions with different systems is genuinely hard. But the practical consequence for a parent is that the federal dataset cannot answer their question.
Where Local Figures Do Exist
The data does exist in many places. It is simply not collected in one place, and the availability varies enormously.
The most productive starting point is your state health department's immunization program page, which in a number of states publishes school-level or district-level coverage and exemption reports. California, for example, has published school-by-school figures for years. Several other states publish district summaries. Others publish nothing below the state level.
The second place to look is your state department of education, which sometimes hosts immunization compliance reporting alongside other school data even when the health department does not.
The third is your local or county health department, which may report coverage for schools in its jurisdiction and which can often answer a direct question by phone even when nothing is posted online.
The fourth, and the most overlooked, is the school itself. Districts collect immunization records as a condition of enrollment and many will tell a parent who asks what share of students have completed requirements or hold exemptions. That is a reasonable question to put to a principal or school nurse.
If none of those produce a number, that absence is itself information. It means neither you nor anyone else in your community can currently see the figure, which is worth raising with a school board.
What Parents Can Actually Do
The honest hierarchy here puts your own household first, because that is the part you control.
Confirm your own child's records are complete and documented before enrollment rather than during it. If a dose is missing or the record cannot be found, that is fixable in a single appointment, and MedicalDaily has covered how to retrieve immunization records through state registries and prior schools.
A fully vaccinated child is well protected regardless of what the school's rate is. Two MMR doses are about 97 percent effective. Local coverage matters most for people who cannot be protected by their own vaccination: infants too young for a first dose, children with medical contraindications, and people who are immunocompromised. If your household includes one of those, local coverage is a genuinely useful input into decisions about exposure.
Ask your pediatrician about early dosing if you live in or plan travel to an area with active measles transmission, since several state health departments have issued guidance on an early dose for infants in those circumstances.
Nobody should choose a school on a coverage figure alone, and no parent should read a low local rate as a reason to panic. It is one factor, and the strongest protective step available to most families is making sure their own child is current.
The confirmed facts are national kindergarten coverage at 92.5 percent for MMR, exemptions at 3.6 percent, and no federal publication of county or district figures. Those most affected are families of infants and immunocompromised children, for whom community coverage matters most. Reasonable actions include verifying your own child's records and asking the state health department or school directly for local figures. The central uncertainty is what coverage looks like in most individual districts, because it is not published. The next expected development is CDC's release of 2025 to 2026 school year data.
Frequently Asked Questions
What is the national kindergarten vaccination rate? For the 2024 to 2025 school year, 92.5 percent for MMR and polio and 92.1 percent for DTaP, all down from the prior year.
How many kindergartners lack MMR documentation? About 286,000 attended school without documentation of completing the MMR series. Roughly 138,000 held an exemption from at least one vaccine.
Does CDC publish county or school district rates? No. SchoolVaxView provides national and state-level estimates only. Local figures depend on whether individual states or districts publish them.
Why does local coverage matter more than the state figure? Measles spreads through clusters of susceptible people. A single school in the seventies can sustain an outbreak inside a state averaging in the nineties.
Where can I find my district's rate? Try your state health department's immunization program, your state education department, your county health department, and the school itself. Availability varies widely by state.
Should I choose a school based on its vaccination rate? It is one factor among many. For most families, the stronger protection is confirming their own child's vaccinations are complete.
Who is most at risk when local coverage is low? Infants too young for a first dose, children with medical contraindications, and people who are immunocompromised, since they cannot rely on their own vaccination.
