Influenza vaccination coverage: findings from immunization information systems
2007

Influenza Vaccination Coverage in Young Children

Sample size: 10000 publication Evidence: moderate

Author Information

Author(s): Laura A. Zimmerman, Diana L. Bartlett, Kyle S. Enger, Kimiko Gosney, Warren G. Williams

Primary Institution: Centers for Disease Control and Prevention

Hypothesis

What is the vaccination coverage among children aged 6–23 months during the 2004–05 influenza season?

Conclusion

About one-third of children received at least one dose of the influenza vaccine, but the rate of full vaccination was low.

Supporting Evidence

  • 30% of children in Arizona received at least one dose of the vaccine.
  • 27% of children in Michigan received at least one dose of the vaccine.
  • 13% of children in Arizona were fully vaccinated.
  • 11% of children in Michigan were fully vaccinated.
  • Vaccination coverage was higher among younger children.

Takeaway

This study looked at how many young kids got their flu shots. It found that many got at least one shot, but not enough got the full two shots they need.

Methodology

Data was collected from immunization information systems in Arizona and Michigan to assess vaccination coverage among children aged 6–23 months.

Potential Biases

Some sites may not contribute their immunization data to the IIS, potentially underestimating vaccination coverage.

Limitations

The study results may not be generalizable to the entire U.S. population and the completeness of reporting by participating sites is unknown.

Participant Demographics

In Arizona, 50% were white, 32% Native American or Alaskan Native, 17% Hispanic, and 1% black or Asian; in Michigan, 85% were white, 9% black, 1% Asian, and 5% other or unknown.

Digital Object Identifier (DOI)

10.1186/1471-2431-7-28

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