Welcome to the Washington State Immunization Information System (IIS)

The Washington IIS is a lifetime immunization registry with records for Washington residents. The IIS is available to all licensed healthcare providers in Washington to support immunization activities. It also serves as the primary vaccine management tool for providers enrolled in the Childhood Vaccine Program, assists schools in assessing immunization compliance and provides official immunization certificates. The immunization information in the IIS is medically verified and reports generated from the IIS should be treated as medically verified data. The Washington IIS is operated by the Washington State Department of Health within the Office of Immunization and Child Profile.