School Vaccine Data Access Varies Widely by State
Access to school-level student vaccination rates, a key indicator for measles outbreak risk, depends on where families live, with some states providing
Parents in Pennsylvania can now check the measles vaccination rate at their child's school on a new state website, but such transparency is not the norm nationwide. The data reveals localized outbreak risks that are often hidden by county or state-level averages.
As a measles outbreak grows in Pennsylvania, parent Amanda Clear used the state tool to learn only about 86% of students at her son's school are vaccinated against measles, below the 95% threshold considered necessary to prevent outbreaks. Her vaccinated son has an immune disorder, making the local data critical for her risk assessment. However, in many states, neither parents nor public health officials routinely know vaccination rates at individual schools.
Research Highlights Localized Risks
Since measles was declared eliminated in the U.S. In 2000, major outbreaks have largely involved close-knit communities with low vaccination uptake. A record-setting outbreak in South Carolina, which ended in April with 997 infections, centered on a vaccine-hesitant community in Spartanburg County. Exposures at 33 schools led to 874 students being quarantined.
Researchers warn that county-level vaccination averages can mask dense clusters of unvaccinated children that fuel outbreaks. By analyzing school-level data from South Carolina, Clemson University researchers mapped clusters of undervaccinated students that correlated with measles exposures. Their findings suggest geographic clustering paves the way for outbreaks.
State-by-State Data Access
Access to school-level vaccination data varies significantly across the United States. Some states post current information publicly, while others require formal records requests or do not collect the data proactively.
| State | Public Access to School-Level Data | Notes |
|---|---|---|
| Texas | No | State law only requires district-wide reporting. School-level data is obtained only during an outbreak. |
| Minnesota | Yes | The health department has posted school and district rates since 2014. |
| Florida | Not easily | Only county-level data is posted publicly. School-specific rates require a request to local health or school districts. |
| South Carolina | Yes (recent) | Began posting school-level data during its recent measles outbreak. |
| California | Yes, but outdated | Most recent interactive data is from 2021-22. More recent spreadsheets are also outdated. |
| Pennsylvania | Yes | A new interactive website launched this summer details rates by school. |
In Texas, legislation to require school-level reporting failed amid lawmaker concerns it could lead to harassment. A state health department spokesperson said data is gathered from schools during an outbreak. Minnesota officials say their public data has increased local awareness and reduced data requests.
Florida's health department, which recently proposed reducing required school vaccines, only posts aggregated county data. A press secretary said school-specific rates are not publicly available unless requested locally. Major districts like Broward and Miami-Dade said they submit only district-wide data to the state.
South Carolina now posts school-level data showing the percentage of children up-to-date on all required shots, helping prioritize outreach to low-coverage schools. California's posted data is years old, though officials have access to current figures. A department spokesperson said newer data will be posted over the next year, suggesting parents contact their school or local health department in the meantime.
Pennsylvania's new tool was announced by Health Secretary Dr. Debra Bogen, who said it provides clear, accessible data to help families and leaders reduce vaccine-preventable diseases.
Data Informs Public Health Strategy
Clemson researchers told Healthbeat that knowing immunization percentages at individual schools informs where health officials focus resources. This includes deploying staff for contact tracing, assessing immunization barriers, and conducting targeted communication campaigns.
Lior Rennert, a professor at the Clemson Center for Public Health Modeling and Response, said the analysis took a massive state-level problem and broke it into more manageable areas. The work demonstrates how school-level data can guide intervention efforts before and during disease outbreaks.
