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Immunization Information Systems Annual Report (IISAR)


The Immunization Information System Annual Report (IISAR) is an annual assessment of Immunization Information Systems (IIS) activity among the 64 immunization program grantees that receive funding under section 317b of the Public Health Service Act. The IISAR is a self-administered web-based questionnaire completed by immunization program managers as part of their annual reporting requirement. Grantees are asked to provide information about their IIS. All data collected are self-reported aggregate data and do not include individually identifiable data on IIS participants.


Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases (CDC/NCIRD)

Data Years Available





Web-based survey.

Selected Content

Number of children under age 6 with two or more vaccinations recorded, public and private provider participation levels, and fulfillment of minimum IIS functional standards.

Population covered

Immunization Program Grantees in the 50 states, 5 cities, the District of Columbia, and 8 Territories.



Response rate and sample size

Some grantees did not report data or do not have IIS.

Interpretation Issues


References Accessed August 25, 2010.