Fast Facts: Sharing and Using Immunization Registry Data

The sharing and use of information kept in a state’s vaccine registry (typically called an immunization information system (IIS)) is governed by state law. In general, personally identifiable data stored in a vaccine registry is confidential and may not be disclosed through public records requests. However, because immunization registry data is useful to many different entities for a variety of purposes, many states do permit specified individuals, businesses, and agencies to access immunization registry data. To learn more about what third parties may have access to immunization data, please read our Fast Facts below.