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

U.S. Vaccination Coverage Reported via NIS

Most Recent Vaccination Coverage Data

The newest data showing national, regional, and state vaccination coverage rates for children 19-35 months old is available in the MMWR and ChildVaxView.

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

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) Press Release
January – December 2014 Aug 2015 2014
January – December 2013 Aug 2014 N/A
January – December 2012 Sept 2013 N/A
July 2011 – June 2012 May 2013 N/A
January – December 2011 Sept 2012 N/A
July 2010 – June 2011 April 2012 N/A
January – December 2010 Sept 2011 N/A
July 2009 – June 2010 June 2011 N/A
January – December 2009 Sept 2010 N/A
July 2008 – June 2009 May 2010 N/A
January – December 2008 N/A
July 2007 – June 2008 March 2009 N/A
January – December 2007 N/A
July 2006 – June 2007 N/A
January – December 2006 N/A
July 2005 – June 2006 N/A
January – December 2005 N/A
January – December 2004 N/A
July 2003 – June 2004 N/A
January – December 2003 N/A
July 2002 – June 2003 N/A
January – December 2002 N/A
July 2001 – June 2002 N/A
January – December 2001 N/A
July 2000 – June 2001 N/A
January – December 2000 N/A
July 1999 – June 2000 N/A
January – December 1999 N/A
July 1998 – June 1999 * N/A
January – December 1998 * N/A
January – December 1997 * N/A
July 1996 – June 1997 * N/A
January – December 1996 * N/A
January – December 1995 * N/A
*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.

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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.

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Page last reviewed: October 5, 2021