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IID-7.2 Data Details

IID-7.2 Achieve and maintain an effective vaccination coverage level of 3 or 4 doses of Haemophilus influenzae type b (Hib) vaccine among children by age 19 to 35 months

About the Data

Description of the data source, numerator, denominator, survey questions, and other relevant details about the national estimate.

National Data Source
National Immunization Survey (NIS); Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases and National Center for Health Statistics (CDC/NCIRD and CDC/NCHS)
Changed Since the Healthy People 2020 Launch
Baseline (Year)
54.8 (2009)
Target-Setting Method
Maintain consistency with national programs, regulations, policies, and laws.
Number of children aged 19 to 35 months receiving at least 3 or 4 doses of Hib, depending on the vaccine brand
Number of children aged 19 to 35 months
Data Collection Frequency
Comparable Healthy People 2010 Objective
Adapted from HP2010 objective
Methodology Notes

The National Immunization Survey (NIS) uses a quarterly, random-digit–dialed sample of telephone numbers to reach households with children aged 19–35 months in the 50 states and selected local areas and territories, followed by a mail survey sent to the children's vaccination providers to collect vaccination information. Data are weighted to represent the population of children aged 19–35 months, with adjustments for households with multiple telephone lines and mixed telephone use (landline and cellular), household nonresponse, and exclusion of households without telephone service. Beginning in 2011, surveys include landline and cellular telephone households.

This measure tracks the proportion of children aged 19 to 35 months receiving at least 3 or 4 doses (the full series including the primary series and booster) of the Haemophilus influenzae type b (Hib) vaccine. The number of Hib vaccine doses required differs according to manufacturer (brand). This measure does take into account the brand of vaccine used and assumes that doses with missing Hib type/brand information are a type requiring 4 doses to be up-to-date.

Trend Issues
The baseline estimate is a reflection of the Hib shortage from Dec 2007 to Sept 2009 and the resulting ACIP recommendation to suspend the booster dose of Hib.

Revision History

Any change to the objective text, baseline, target, target-setting method or data source since the Healthy People 2020 launch.

Description of Changes Since the Healthy People 2020 Launch

In 2012, the baseline was changed from 57 (first two quarters of 2009 data) to 54.8 (2009). The workgroup requested this revision because the 2009 National Immunization Survey (NIS) introduced a new method for measuring Hib vaccination coverage so the survey could distinguish between Hib vaccine product types that require a different number of doses to be fully vaccinated. These 2009 NIS data were not available during the target-setting process in early 2010. The target was not revised. The methodology notes were changed to read: Data collection on the type of Hib vaccine began in January 2009, therefore this baseline estimate is based on data collected in 2009.


Additional resources about the objective.

  1. CDC. National and State Vaccination Coverage Among Children Aged 19--35 Months --- United States, 2010. MMWR 2011:60(34):1157-1163. Available from:
  2. CDC. National, State, and Local Area Vaccination Coverage Among Children Aged 19--35 Months --- United States, 2009. MMWR 2010;59(36):1171-1177. Available from:
  3. CDC. National, State, and Local Area Vaccination Coverage Among Children Aged 19–35 Months — United States, 2011. MMWR 2012;61(35):689-696. Available from: