Information on 2022 IISAR Data Participation Rates

At a glance

Child, adolescent, and adult participation rates in IIS are reported for the 2022 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 2012 Immunization Information System progress report in Morbidity and Mortality Weekly Report.

2022 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, and the District of Columbia, and eight territories) in 2022.

National coverage: 98% (excluding territories)

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

State/City Percentage
Alabama 104.6%
Alaska 76.1%
Arizona 105.0%
Arkansas 101.6%
California 95.4%
Chicago, IL 101.8%
Colorado 106.4%
Connecticut 100.3%
DC 123.2%
Delaware 104.2%
Florida 91.9%
Georgia 104.7%
Hawaii 67.3%
Houston, TX 135.0%
Idaho 95.4%
Illinois* 93.5%
Indiana 99.2%
Iowa 102.1%
Kansas 93.5%
Kentucky 100.9%
Louisiana 106.6%
Maine 99.3%
Maryland 102.1%
Massachusetts 108.6%
Michigan 97.4%
Minnesota 97.8%
Mississippi 111.4%
Missouri 88.2%
Montana 94.8%
Nebraska 96.9%
Nevada 102.1%
New Hampshire 70.6%
New Jersey 98.0%
New Mexico 101.2%
New York* 94.9%
New York City, NY 104.4%
North Carolina 103.6%
North Dakota 94.5%
Ohio 95.1%
Oklahoma 92.7%
Oregon 100.1%
Pennsylvania* 91.3%
Philadelphia, PA 110.6%
Rhode Island 104.5%
San Antonio, TX 91.8%
South Carolina 107.9%
South Dakota 96.7%
Tennessee 99.7%
Texas* 82.0%
Utah 102.2%
Vermont 103.6%
Virginia 108.3%
Washington 100.7%
West Virginia 95.5%
Wisconsin 97.9%
Wyoming 103.5%

Territories Percentage
American Samoa 115.7%
Guam 45.7%
Marshall Islands 62.4%
Federated States of Micronesia 105.6%
Northern Mariana Islands 83.6%
Palau 0.0%
Puerto Rico 91.8%
Virgin Islands 61.1%

Footnotes

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

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 2022 Census estimates for each state and city.

Source: Immunization Information System Annual Report, CY2022

2022 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, and the District of Columbia, and eight territories) 2022.

National coverage: 86% (excluding territories)

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

State/City Percentage
Alabama 14.8%
Alaska 79.1%
Arizona 105.0%
Arkansas 97.4%
California 79.6%
Chicago, IL 100.9%
Colorado 95.0%
Connecticut 84.8%
DC 131.4%
Delaware 96.2%
Florida 73.3%
Georgia 97.1%
Hawaii 61.4%
Houston, TX 128.3%
Idaho 80.1%
Illinois* 92.7%
Indiana 93.8%
Iowa 89.8%
Kansas 87.7%
Kentucky 91.3%
Louisiana 98.0%
Maine 94.5%
Maryland 90.2%
Massachusetts 105.9%
Michigan 88.0%
Minnesota 85.7%
Mississippi 91.8%
Missouri 74.9%
Montana 82.2%
Nebraska 87.3%
Nevada 93.9%
New Hampshire 64.2%
New Jersey 83.3%
New Mexico 114.5%
New York* 97.0%
New York City, NY 95.8%
North Carolina 90.2%
North Dakota 89.0%
Ohio 83.3%
Oklahoma 78.1%
Oregon 87.7%
Pennsylvania* 85.5%
Philadelphia, PA 111.7%
Rhode Island 94.1%
San Antonio, TX 69.5%
South Carolina 89.5%
South Dakota 92.6%
Tennessee 85.4%
Texas* 65.9%
Utah 90.4%
Vermont 94.1%
Virginia 112.7%
Washington 95.7%
West Virginia 85.2%
Wisconsin 87.4%
Wyoming 86.8%

Territories Percentage
American Samoa 130.4%
Guam 71.9%
Marshall Islands 71.3%
Federated States of Micronesia 99.1%
Northern Mariana Islands 88.1%
Palau 60.7%
Puerto Rico 89.1%
Virgin Islands 56.6%

Footnotes

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

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 2022 Census estimates for each state and city.

Source: Immunization Information System Annual Report, CY2022

2022 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, and the District of Columbia, and eight territories) in 2022.

National coverage: 94% (excluding territories)

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

State/City Percentage
Alabama 50.5%
Alaska 98.7%
Arizona 107.4%
Arkansas 119.0%
California 86.8%
Chicago, IL 114.4%
Colorado 117.0%
Connecticut 97.4%
DC 150.1%
Delaware 110.8%
Florida 121.7%
Georgia 104.5%
Hawaii 68.3%
Houston, TX 26.6%
Idaho 98.3%
Illinois* 108.4%
Indiana 107.3%
Iowa 94.6%
Kansas 116.2%
Kentucky 100.4%
Louisiana 104.9%
Maine 102.0%
Maryland 84.0%
Massachusetts 135.0%
Michigan 104.6%
Minnesota 114.7%
Mississippi 100.7%
Missouri 95.3%
Montana 109.0%
Nebraska 112.5%
Nevada 128.8%
New Hampshire 81.3%
New Jersey 18.2%
New Mexico 118.1%
New York* 99.4%
New York City, NY 116.3%
North Carolina 63.2%
North Dakota 96.9%
Ohio 99.9%
Oklahoma 97.9%
Oregon 121.7%
Pennsylvania* 113.8%
Philadelphia, PA 123.7%
Rhode Island 87.5%
San Antonio, TX 24.7%
South Carolina 103.1%
South Dakota 117.5%
Tennessee 93.6%
Texas* 17.7%
Utah 107.6%
Vermont 113.2%
Virginia 133.6%
Washington 117.3%
West Virginia 107.4%
Wisconsin 112.4%
Wyoming 110.6%

Territories Percentage
American Samoa 141.8%
Guam 105.9%
Marshall Islands 79.1%
Federated States of Micronesia 108.5%
Northern Mariana Islands 113.1%
Palau 58.9%
Puerto Rico 100.2%
Virgin Islands 73.2%

Footnotes

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

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 2022 Census estimates for each state and city.

Source: Immunization Information System Annual Report, CY2022