Immunization Information Systems (IIS):
- Are confidential, population-based, computerized databases that record all immunization doses administered by providers to persons residing within a given geopolitical area
- Help providers and families consolidate immunization information into one reliable source
- Save money by ensuring that children and adults receive only needed vaccines, and improve office efficiency by reducing the time needed to gather and review immunization records
- Was initially a repository for childhood immunizations that focused on pre-school children, and expanded (when allowable by state law) to encompass lifelong immunization and/or emergency preparedness and response
