Welcome to the Vaccines and Immunizations website.
Skip directly to the search box, site navigation, or content.

Department of Health and Human Services
Centers for Disease Control and Prevention


Vaccines & Immunizations

Programs & Tools:

2003 Child Participation Map

Percentage of U.S. Children >4 months and <6 years with 2+ Immunizations in Immunization Information Systems, December 31, 2003
State/Territory in Each State Percentage
Alabama 94
Alaska 52
Arizona 95
Arkansas 100
California 18
Chicago, IL 57
Colorado 16
Connecticut 66
DC 97
Delaware 100
Florida 28
Georgia 11
Hawaii 49
Houston, TX 36
Idaho 68
Illinois 57
Indiana 64
Iowa 44
Kansas no report
Kentucky no report
Louisiana 52
Maine 10
Maryland 10
Massachusetts 6
Michigan 100
Minnesota 37
Mississippi 89
Missouri 67
Montana 69
Nebraska 24
Nevada no report
New Hampshire 1
New Jersey 24
New Mexico 83
New York 7
New York City 100
North Carolina no report
North Dakota 100
Ohio 26
Oklahoma 81
Oregon 100
Pennsylvania 6
Philadelphia, PA 91
Rhode Island 83
San Antonio, TX 100
South Carolina 78
South Dakota 65
Tennessee 90
Texas 44
Utah 78
Vermont 9
Virginia 24
Washington 68
West Virginia 69
Wisconsin 90
Wyoming 24

In 2003, 44% of the U.S. children greater than 4 months less than 6 years of age (or about 22 million children) had 2 or more immunizations in a state or local IIS. Six 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.

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 2003 Census Report for each state and city.

 Return to main IRAR Data Rates page

This page last modified on October 23, 2006
Content last reviewed on October 23, 2004
Content Source: National Center for Immunization and Respiratory Diseases

Quick Links

IIS Registry logo

Safer Healthier People

Centers for Disease Control and Prevention 1600 Clifton Rd, Atlanta, GA 30333, U.S.A
Public Inquiries: 1-800-CDC-INFO (232-4636); 1-888-232-6348 (TTY)

Vaccines and Immunizations