State Immunization Data

This repo has data on state-level immunization.

The data-raw folder holds all raw data:

• measles_cases_upd.csv has measles cases for each county. Data comes from the Johns Hopkins U.S Measles Tracker. Data last updated on August 7, 2025.
• mmr1_coverage.csv presents data on the proportion of kindergartners who received at least 1 dose of measles, mumps, and rubella (MMR) vaccine in the past school year. This data is available from the CDC's SchoolVaxView website. Data last updated on July 31, 2025.
• dtap_coverage.csv presents data on the proportion of 2-year-olds (24 months) who have received at least 4 doses of the DTaP vaccine. This data is available from the CDC's ChildVaxView website. Data last updated on August 20, 2024.
• non_medical_exemption_rates.csv has non-medical exemption rates for each state. Data comes from the CDC's SchoolVaxView website. Data last updated on July 31, 2025.
• non_medical_exemption_policies.csv presents information on state policies regarding non-medical exemptions, such as those based on religious or personal beliefs. In some states, personal exemptions are also called “philosophical exemptions.” This data is available from the National Conference of State Legislatures (NCSL) brief on 'State Non-Medical Exemptions From School Immunization Requirements'. Data last updated on July 24, 2025.
• health_spending.csv has public health spending per capita for 2022-2023, available from 'America's health rankings'. Data from CDC, HRSA and Trust for America's Health, 2022-2023.
• universal_purchase.csv presents data on the 'Universal Vaccine Purchase Program', which is a state-led program in which the state government acquires all vaccines recommended by the Advisory Committee on Immunization Practices (ACIP) for every resident, regardless of their insurance coverage or ability to pay. Available from the Association of Immunization Managers (AIM), Policy Maps – Universal Vaccine Purchase Program.Data last updated on April 2025.
• state_policies.csv presents data on state policies that could affect childhood immunization. This dataset is derived from multiple sources, including the Association of Immunization Managers, Legislative Round-ups; keyword search on LegiScan and NCSL's 'State Public Health Legislation Database'. Data last updated on May 31, 2025 (AIM Legislative Round-up)

We use the data-raw/import-data.R file to import and clean all of the above files. The data-raw/import-data.R file then saves a set of clean CSV files into the data-clean folder.

The data-clean folder holds all clean data:

• total_measles_cases.csv has measles cases for each state
• mmr_coverage_final.csv has data for at least one dose of MMR vaccine coverage for kindergartners for 2021-2025 school years.
• dtap_coverage_final.csv has data for at least 4 doses of DTaP vaccine at 24 months for children born between 2017-2021.
• non_medical_exemption.csv has data on non-medical exemption rates for all states
• non_medical_exemption_policies.csv presents state level policies on religious and personal exemptions.
• health_spending_final.csv has data on public health spending per capita for 2022-2023.
• universal_purchase_final.csv presents data on a state's participation in the 'Universal Vaccine Purchase Program'
• state_policies_final.csv has data on state level immunization related policies that could strengthen or weaken vaccine safety nets.

The CSV files in the data-clean folder are used to generate state-level immunization reports for all 50 states, the District of Columbia, and Puerto Rico.