2011 National Immunization Survey Data Released

September 6, 2012: Content on this page kept for historical reasons.

Change in Survey Method

In 2011, the NIS sampling frame was expanded from sampling only landline phones to sampling landline and cell phones, creating a dual frame sample. See Adding Households with Cell Phone Service to the National Immunization Survey (NIS), 2011 for key findings, differences in results, weighting methods, and more.

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

National Immunization Survey – Teens (13 through 17 years old)

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Page last reviewed: September 6, 2012 (archived document)