Immunization information systems progress - United States- 2005.

Immunization registries are confidential- computerized information

systems that collect and consolidate vaccination data from multiple

health-care providers- generate reminder and recall notifications-

and assess vaccination coverage within a defined geographic area. A

registry with added capabilities- such as vaccine management-

adverse event reporting- lifespan vaccination histories- and

linkages with electronic data sources- is called an immunization

information system (IIS). This report summarizes data from CDC\'s

2005 Immunization Information System Annual Report (IISAR)- a

survey of grantees in 50 states- five cities- and the District of

Columbia (DC) that receive funding under section 317b of the Public

Health Service Act. These data indicated that approximately 56% of

U.S. children aged