The shares of kindergartners in schools with low MMR vaccine rates vary widely across the state

Source: California Department of Public Health, 2024-25.
NOTES: Data is not available for schools with fewer than 20 students. The percentage of kindergartners in schools with 20+ students in counties included in the data ranges from 81.4% to 99.6%. Diagonal lines indicate counties (Trinity and Alpine) whose data is not shown because they have few kindergartners in schools with more than 20 students. Most counties with 0% of kindergartners in schools with low MMR vaccine rates also have very few kindergarten students.
FROM: PPIC Blog, April 2026.
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