U.S. Vaccination Coverage Reported via NIS
National Immunization Survey (NIS)

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National Immunization Survey (NIS) - Children (19-35 months)

The NIS is a large, on-going survey of immunization coverage among U.S. pre-school children (19 through 35 months old).

• Overview
• How to use NIS data
• NIS Data: Tables, Articles, & Figures
• Frequently Asked Questions (FAQs)
• Technical notes for NIS tables
• Related articles
• Public Use Data Files (PUF)

The tables, figures, and related articles in the table below, describe vaccination coverage at the U.S. national level and by state and immunization action plan (IAP) areas using results from the National Immunization Survey (NIS).

Some NIS tables are only available as Excel files.

(Children) NIS Data (timeframe)	Tables	Articles	Figures
January - December 2011 Sept 2012	2011	2011	2011
July 2010 - June 2011 April 2012	10/11	10/11	10/11
January - December 2010 Sept 2011	2010	2010	2010
July 2009 - June 2010 June 2011	09/10	09/10	09/10
January - December 2009 Sept 2010	2009	2009	2009
July 2008 - June 2009 May 2010	08/09	08/09	08/09
January - December 2008	2008	2008	2008
July 2007 - June 2008 March 2009	07/08	07/08	07/08
January - December 2007	2007	2007	2007
July 2006 - June 2007	06/07	06/07	06/07
January - December 2006	2006	2006	2006
July 2005 - June 2006	05/06	05/06	05/06
January - December 2005	2005	2005	2005
January - December 2004	2004	2004	2004
July 2003 - June 2004	03/04	03/04	03/04
January - December 2003	2003	2003	2003
July 2002 - June 2003	02/03	02/03	02/03
January - December 2002	2002	2002	2002
July 2001 - June 2002	01/02	01/02	01/02
January - December 2001	2001	2001	2001
July 2000 - June 2001	00/01	00/01	00/01
January - December 2000	2000	2000	2000
July 1999 - June 2000	99/00	99/00	99/00
January - December 1999	1999	1999	1999
July 1998 - June 1999 *	98/99	98/99	98/99
January - December 1998 *	1998	1998	1998
January - December 1997 *	1997	1997	1997
July 1996 - June 1997 *	96/97	96/97	96/97
January - December 1996 *	1996	1996	1996
January - December 1995 *	1995	1995	1995
July 1994 - June 1995 *	94/95	94/95	94/95
January - December 1994 *	1994	1994	1994
*The statistical methodology for estimating vaccination coverage rates for NIS data was changed in 1998. The new methodology facilitates valid statistical analyses accounts for the survey's complex sampling design. Small differences exist between vaccination coverage estimates appearing in MMWRs published before 1998 and estimates published on this website. More information on methodologies... All estimates published on this website are calculated using this new methodology. Indicates file is an image (.gif)

The National Immunization Survey (NIS) has been conducted annually since 1994 by the National Immunization Program and the National Center for Health Statistics, Centers for Disease Control and Prevention. The NIS is used to obtain national, state, and selected urban area estimates of vaccination coverage rates for U.S. children between the ages of 19 and 35 months. The NIS is a random digit dialing telephone survey of households with age-eligible children followed by a mail survey of the children's vaccination providers to validate immunization information.

NIS-Teen Data - Adolescents/Teens (13-17 years)

• Frequently Asked Questions (FAQs)
• Technical notes for NIS-Teen tables
• Related articles
• Public Use Data Files (PUF)

The tables, figures, and related articles in the table below, describe vaccination coverage at the U.S. national level and by state and immunization action plan (IAP) areas using results from the National Immunization Survey-Teen (NIS-TEEN). Adolescent/teens are age 13 through 17 years.

National Immunization Survey (NIS) - Adults only

The NIS-Adult study is designed to help researchers better understand why some adults choose not to get vaccinated for preventable diseases.

Summer 2007 Self-Reported Vaccination Coverage among U.S. Adults

• (text-only for screen-reader devices)

NIS-Adult was a landline telephone survey conducted during May, June, July and August 2007. The sample was selected at random from two national lists of household telephone numbers. (One list was age-group and racial/ethnic group-specific of respondents to the National Health Interview Survey. The other list was provided by a subcontractor, Survey Sampling International and was age-group-specific.) Vaccinations were self-reported and not validated by comparing to the respondent’s medical chart. The interview completion rate was 74% with a 64% resolution rate and a 64% screening rate for a CASRO rate of 31%. (“CASRO” stands for Council of American Survey Research Organizations, which defined a standardized overall response rate for telephone surveys that is the product of three specific rates—interview completion rate, resolution rate, and screening rate.) Before analysis the data were weighted to adjust for non-response, households that do not have a landline telephone or do not have a telephone, and to match the age, gender and racial/ethnic distribution of the country. The contracting survey company was the National Opinion Research Center (NORC) at the University of Chicago.

For more information about the NIS-Adult, please view the Frequently Asked Questions by respondents.