1. Immunization Information Systems Current Status
National Immunization Conference
Kansas City, MO
March 6, 2007
Gary Urquhart, Acting Chief
Immunization Information Systems Support Branch
Immunization Services Division
National Center for Immunization and Respiratory Diseases

2. Percentage of U.S. Children aged < 6 years Participating in Immunization Information Systems – December 31, 2005
Chicago (34%-66%)
Houston (34%-66%)
New York City (95%–100%)
Philadelphia (95%–100%)
San Antonio (67%–94%)
Washington DC (67%–94%)
In 2005, data suggest that 56% (or almost 13 million) of the U.S. children greater than 4 months less than 6 years of age had 2 or more immunizations in a state or local immunization information system. Nine states and two cities reported over 95% of their children greater than 4 months and less than 6 years of age with at least two immunizations in the IIS. Another ten states and the Washington D.C. have participation rates of 80 to 94%.
*Participation is defined as a child having two or more vaccinations recorded in an immunization information system.
†Grantees include 50 states, five cities and the District of Columbia, funded under section 317b of the Public Health Service Act.
§Chicago, Illinois (34%-66%);
District of Columbia (67%–94%);
Houston, Texas (34%–66%);
New York City, New York (95%–100%);
Philadelphia, Pennsylvania (95%–100%);
San Antonio, Texas (67%–94%).
No Report
0-33%
34-66%
67-94%
95-100%
National Average: 56%
Source: CY 2005 IISAR

3. Percentage of U.S. Public Provider Sites Participating in an Immunization Information System – December 31, 2005
Chicago (34%-66%)
Houston (67%–94%)
New York City (95%–100%)
Philadelphia (95%–100%)
San Antonio (95%–100%)
Washington DC (67%–94%)
In the 50 states and 6 cities that operate IISs regionally or state-wide, an average of 75% of public immunization provider sites submitted data to their IIS during the last six months of Twenty-three states and five cities reported over 95% of their public immunization provider sites submitting data to the IIS. These results are based on self reported data from CDC immunization grantees.
Qualifier: reported annual fluctuations in public provider participation may be due to programmatic and/or technical changes to the immunization information system.
†Grantees include 50 states, five cities and the District of Columbia, funded under section 317b of the Public Health Service Act.
§Chicago, Illinois (34%-66%); District of Columbia (67%–94%); Houston, Texas (67%–94%); New York City, New York (95%–100%); Philadelphia, Pennsylvania (95%–100%); San Antonio, Texas (95%–100%).
No Report
0-33%
34-66%
67-94%
95-100%
National Average: 75%
Source: CY 2005 IISAR

4. Percentage of U.S. Private Provider Sites Participating in an Immunization Information System – December 31, 2005
Chicago (0%-33%)
Houston (34%–66%)
New York City (67%–94%)
Philadelphia (95%–100%)
San Antonio (95%–100%)
Washington DC (95%–100%)
In the 50 states and 6 cities that operate IISs regionally or state-wide, an average of 44% of private provider sites submitted data to the IIS during the last six months of Five states and three cities reported over 95% of their private immunization provider sites submitting data to the IIS. The results are based on self reported data from CDC immunization grantees.
Qualifier: reported annual fluctuations in private provider participation may be due to programmatic and/or technical changes to the immunization information system.
†Grantees include 50 states, five cities and the District of Columbia, funded under section 317b of the Public Health Service Act.
§Chicago, Illinois (0%-33%); District of Columbia (95%–100%); Houston, Texas (34%–66%); New York City, New York (67%–94%); Philadelphia, Pennsylvania (95%–100%); San Antonio, Texas (95%–100%).
No Report
0-33%
34-66%
67-94%
95-100%
National Average: %
Source: CY 2005 IISAR

5. IIS Progress to Improve Participation
2000
2005
Participation of U.S. children < 6 years in an IIS with 2 or more immunizations.
21%
56%
(12.9 million children < 6 years)
Participation of public provider sites submitting data to an IIS in the past 6 months.
38%
75%
(6,753 private provider sites)
Participation of private provider sites submitting data to an IIS in the past 6 months.
19%
44%
(20,142 private provider sites)

6. IIS Capacity to Track Adolescent and Adult Vaccinations
Provisional data from the 2005 Immunization Information System Annual Report indicate that:
About 21% (12 of 56 grantees) report that they include birth to < 23 years of age in their IIS.
About 63% (35 of 56 grantees) report that they include all ages in their IISs.