The Disneyland Measles Outbreak and California's most dangerous school districts for kindergartners
In late January 2015, a serious outbreak of Measles began in Disneyland in Orange County, California. The Golden State has long been known for its high concentration of parents who have not vaccinated their children. In some parts of California, vaccination rates have dropped far below the required level to maintain herd immunity. This Silk examines data on the California public school districts and schools with the lowest vaccination rates. You can map them, build charts, and gain a visual understanding of which schools and regions have the lowest rates of vaccination - and therefore present the greatest risk.
How to Use This Silk: Browse the charts and maps below. Click "Explore" anywhere on the site to go into visualization and filtering mode. Search for individual pages or entities in the top search box.
The Most Dangerous Kindergartens in California - 133 Districts Have MMR Vaccination Rates of 80% or Lower
To attend a public or private U.S. elementary school, children must be up to date with the following vaccinations: Polio, Diphtheria-Tetanus-Pertussis, Measels-Mumps-Rubella, Hepatitis B and Varicella. In this Silk we look at the numbers behind public kindergartens enrollments and the relative immunization statistics. The source of the data is the California Department of Public Health. We've focused on public kindergartens, and have aggregated statistics on public vs. private.
Here's 5 things we found:
- In 22 Californian schools districts 50% or more of the children are not up to date with vaccinations. Of these, almost a fourth are located in Humboldt County. Explore this fact here.
- 7.5% of the children in CA public kindergartens are missing the Diphtheria, Tetanus and Pertussis vaccine. Explore this fact here.
- In 8 public school districts more than half of the kindergartners don't have all mandatory vaccinations because of parents' personal beliefs. Explore this fact here.
- At Big Sur Charter, 10 out of 13 children (77%) aren't up to date with vaccinations because of personal beliefs. Explore this fact here.
- Personal beliefs exempt from required vaccinations 6% of grade-K children enrolled in California's private schools. In public school the number is "only" 3%. Explore this fact here.
About this site
This site was created with Silk, a platform for easily structuring information, so that it can be organized, queried, visualized and shared in a few clicks. The Silk team built this as a demonstration project. You can contact us at firstname.lastname@example.org.
To download the cleaned dataset imported to create this DB, click here.
You'll find four spreadsheets, all released under Creative Commons
- All schools
- Public school districts aggregation & Census data
- Types of vaccines
- Public vs. Private
To read more on how to interpret the variables and on the data processing/aggregation carried out to build this Silk, click here.