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2011 IISAR Data Participation Rates

Child, adolescent, and adult participation rates in IIS are reported for the 2011 IISAR to monitor progress toward Healthy People 2020 objectives and program initiatives. For a discussion on the calculation and reporting of provider site participation rates in IIS, please see the 2010 Immunization Information System progress report in Morbidity and Mortality Weekly Report

2011 CHILD Participation Table and Map

Percentage of U.S. Children < 6 years with 2+ Immunizations in IIS

Percentage of children aged <6 years participating in an immunization information system (IIS) in the United States (including all 50 states, five cities, the District of Columbia, and eight Territories*) in 2011.

National coverage: 84% (excluding territories)

Map of this data (printable version) [1 page]

State/City Percentage
Alabama 84%
Alaska 61%
Arizona 110%
Arkansas 110%
California 65%
Chicago, IL** 49%
Colorado 97%
Connecticut no data
DC 103%
Delaware 102%
Florida 114%
Georgia 117%
Hawaii 24%
Houston, TX** 63%
Idaho 102%
Illinois 86%
Indiana 79%
Iowa 96%
Kansas 72%
Kentucky 46%
Louisiana 109%
Maine 82%
Maryland 57%
Massachusetts 0%
Michigan 101%
Minnesota 102%
Mississippi 107%
Missouri 70%
Montana 88%
Nebraska 43%
Nevada 92%
New Hampshire no IIS
New Jersey 80%
New Mexico 105%
New York 92%
New York City, NY** 119%
North Carolina 102%
North Dakota 104%
Ohio 88%
Oklahoma 94%
Oregon 108%
Pennsylvania 53%
Philadelphia, PA** 111%
Rhode Island 105%
San Antonio, TX** 94%
South Carolina 51%
South Dakota 102%
Tennessee 80%
Texas 87%
Utah 87%
Vermont 97%
Virginia 78%
Washington 100%
West Virginia 96%
Wisconsin 102%
Wyoming 95%

Footnotes

* American Samoa (no data), Marshall Islands (104%), Federated States of Micronesia (114%), Guam (76%), N. Mariana Islands (no data), Palau (32%), Puerto Rico (86%), and Virgin Islands (no IIS).

** City-based IIS participation rates are reported separately from their respective states; state rates do not include city data in their values.

Qualifier: reported annual fluctuations in child participation may be due to programmatic and/or technical changes to the immunization information system. The denominator used to calculate child participation numbers are drawn from the 2011 Census estimates for each state and city.

Source: Immunization Information System Annual Report, CY2011

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2011 ADOLESCENT Participation Table and Map

Percentage of U.S. Adolescents 11-17 years with 2+ Adolescent Immunizations in IIS

Percentage of adolescents aged 11-17 years participating in an immunization information system (IIS) in the United States (including all 50 states, five cities, the District of Columbia, and eight Territories*) in 2011.

National coverage: 53% (excluding territories)

Map of this data (printable version) [1 page]

State/City Percentage
Alabama 57%
Alaska 33%
Arizona 60%
Arkansas 53%
California 26%
Chicago, IL** 13%
Colorado 59%
Connecticut No Data
DC 56%
Delaware 111%
Florida 112%
Georgia 133%
Hawaii 18%
Houston, TX** 28%
Idaho 35%
Illinois 21%
Indiana 116%
Iowa 100%
Kansas 35%
Kentucky 16%
Louisiana 68%
Maine 43%
Maryland 16%
Massachusetts 0%
Michigan 73%
Minnesota 63%
Mississippi 27%
Missouri 20%
Montana 47%
Nebraska 29%
Nevada 58%
New Hampshire No IIS
New Jersey 50%
New Mexico 65%
New York 62%
New York City, NY** 81%
North Carolina 67%
North Dakota 119%
Ohio 31%
Oklahoma 48%
Oregon 63%
Pennsylvania 32%
Philadelphia, PA** 74%
Rhode Island 70%
San Antonio, TX** 51%
South Carolina 18%
South Dakota 60%
Tennessee 87%
Texas 43%
Utah 9%
Vermont 86%
Virginia 54%
Washington 62%
West Virginia 34%
Wisconsin 106%
Wyoming 59%

Footnotes

* American Samoa (no data), Marshall Islands (112%), Federated States of Micronesia (7%), Guam (77%), N. Mariana Islands (no data), Palau (72%), Puerto Rico (103%), and Virgin Islands (no IIS).

** City-based IIS participation rates are reported separately from their respective states; state rates do not include city data in their values.

Source: Immunization Information System Annual Report, CY2011

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2011 ADULT Participation Table and Map

Percentage of U.S. Adults 19+ years with 1+ Adult Immunizations in IIS

Percentage of adults aged 19+ years participating in an immunization information system (IIS) in the United States (including all 50 states, five cities, the District of Columbia, and eight Territories*) in 2011

National coverage: 24% (excluding territories)

Map of this data (printable version) [1 page]

State/City Percentage
Alabama 49%
Alaska 46%
Arizona 268%
Arkansas 46%
California 7%
Chicago, IL** 0%
Colorado 25%
Connecticut No Data
DC 9%
Delaware 45%
Florida 43%
Georgia 73%
Hawaii 3%
Houston, TX** 0%
Idaho 26%
Illinois 5%
Indiana 42%
Iowa 64%
Kansas 28%
Kentucky 4%
Louisiana 29%
Maine 15%
Maryland 6%
Massachusetts 0%
Michigan 31%
Minnesota 76%
Mississippi 32%
Missouri 14%
Montana 33%
Nebraska 18%
Nevada 35%
New Hampshire No IIS
New Jersey 3%
New Mexico 25%
New York 4%
New York City, NY** 4%
North Carolina 27%
North Dakota 66%
Ohio 13%
Oklahoma 43%
Oregon 51%
Pennsylvania 15%
Philadelphia, PA** 12%
Rhode Island No Data
San Antonio, TX** 14%
South Carolina 49%
South Dakota 48%
Tennessee 21%
Texas 0%
Utah 8%
Vermont 12%
Virginia 39%
Washington 54%
West Virginia 33%
Wisconsin 100%
Wyoming 47%

Footnotes

* American Samoa (no data), Marshall Islands (11%), Federated States of Micronesia (21%), Guam (16%), N. Mariana Islands (no data), Palau (112%), Puerto Rico (31%), and Virgin Islands (no IIS).

** City-based IIS participation rates are reported separately from their respective states; state rates do not include city data in their values.

Source: Immunization Information System Annual Report, CY2011

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