The Arizona State Immunization Information System (ASIIS) is an immunization registry designed to capture immunization data on individuals within the state. Providers are mandated under Arizona Revised Statute (ARS) §36-135 to report all immunizations administered to children 18 years of age and younger to the state's health department. The registry serves as a receptacle for accommodating these reported data. In this capacity, the registry then provides a valuable tool for the management and reporting of immunization information to public health professionals, private and public healthcare providers, parents, guardians and other child care personnel.