State records contain the patient's name, sex, date of birth, state or country of birth, mother's name, and the date and types of immunizations given in the Immunization Information Systems, or IIS. Additional information varies by state.
Immunization reporting requirements are determined by state and local law. For example, as of 2015 in New York, medical providers that order an immunization for a patient must enter that data into the state or city IIS within 14 days. In Arizona, providers must report any immunizations given to children under the age of 18.
The purpose of the immunization registry is to provide information about the patient's immunization history and ensure that children have the necessary immunizations. It includes vaccination schedules and makes it easy for doctors to print an immunization history for a patient. IIS system can be set up to communicate with electronic medical records. The data is maintained on a state and local level; the Centers for Disease Control and Prevention does not have access to these systems.