Connecticut MMR Vaccination Coverage
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What is the kindergarten MMR vaccination rate in Connecticut? This page shows Connecticut's measles, mumps, and rubella (MMR) vaccine coverage among kindergartners, whether it meets the 95% herd immunity threshold, and how it compares to nearby states. Data comes from the CDC's SchoolVaxView survey. Also see Connecticut measles cases.
kindergarten MMR coverage
2024-25 school year
Exemption Rates (2024-25)
Key Takeaways
- 1 Connecticut kindergarten MMR coverage is 98.2% for the 2024-25 school year.
- 2 This meets the 95% herd immunity threshold for measles.
- 3 Coverage has improved over recent years, up from 95.3% in 2020-21.
- 4 Non-medical exemptions (0.1%) account for most of the exemption rate.
CDC Recommendations at This Level
Vaccination rates are strong in your state
- • Your state meets or exceeds the 95% herd immunity threshold — great community protection
- • Keep your family's vaccinations current as children reach school age
- • Talk to friends and family in other states about the importance of MMR vaccination
This is general public health guidance based on CDC recommendations — not personal medical advice. Talk to your healthcare provider about what's right for you and your family.
Connecticut MMR Coverage Trend
Kindergarten MMR coverage rates by school year. Red dashed line = 95% herd immunity threshold.
Measles Cases in Connecticut
Connecticut has not reported any measles cases in 2026.
View Connecticut measles data →Nearby States MMR Coverage
| State | Coverage | Below 95% |
|---|---|---|
| 97.8% | No | |
| 96.6% | No | |
| 96.7% | No |
Sources & Methods
MMR coverage data comes from the CDC's SchoolVaxView program, which collects kindergarten vaccination coverage estimates reported by states and territories. Coverage is for the 2024-25 school year. Risk levels are computed relative to the 95% herd immunity threshold. Learn more about our methods .
More Health Data for Connecticut
Cities in Connecticut
Health data available for these Connecticut cities:
Frequently Asked Questions
What is the MMR vaccination rate in Connecticut?
Kindergarten MMR coverage in Connecticut is 98.2% for the 2024-25 school year. This meets the 95% herd immunity threshold.
Why is 95% coverage important?
Measles is extremely contagious. About 95% of a community needs to be vaccinated to prevent sustained transmission — this is called "herd immunity." When coverage drops below this threshold, outbreaks become more likely, putting unvaccinated individuals at risk.
What are vaccine exemptions?
Vaccine exemptions allow children to attend school without certain vaccinations. Medical exemptions are granted for children who cannot be safely vaccinated. Non-medical exemptions (religious or philosophical) vary by state law. Higher exemption rates are associated with lower coverage and increased outbreak risk.
Local Health Signal is not affiliated with the CDC or any government agency. Data is provided for informational purposes only and is not intended for clinical decision making. See our methods page for details on data sources and limitations.