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Midseason Influenza Vaccine Use by Adults in the U.S.
What is the Midseason Flu Survey?
In mid-November, RAND conducted a survey of a nationally representative sample of adults age 18 and over (n=3,969) to collect data on the receipt of the influenza vaccine in the United States. The results of this survey will inform public health officials and other stakeholders about progress toward vaccinating adults prior to the end of the vaccination season in late winter while action can still be taken to improve uptake.
The Advisory Committee on Immunization Practices (ACIP) of the Centers for Disease Control and Prevention (CDC) specifically recommends annual influenza vaccination for adults with one or more of the following indications: age 50 or older; having a high-risk health condition; being a health-care worker; or having contact with or caring for young children, the elderly, or high-risk individuals.[1] Survey results suggest individuals with indications comprise roughly seven in ten U.S. adults. The ACIP also recommends annual vaccination against influenza for any adult who wants to reduce the risk of becoming ill with influenza or of transmitting it to others.
Survey results suggest that by mid-November 2008:
- 30 percent of all U.S. adults had been vaccinated against influenza
- 37 percent of U.S. adults with a health or occupational indication had been vaccinated
- 17 percent of adults and adults with indications intended to receive the vaccine by the end of the vaccination season
Publications
Midseason Influenza Vaccine Use by Adults in the U.S.
A Snapshot as of Mid-November 2008 — 2008
This occasional paper provides key findings from a national survey of adults measuring influenza vaccination rates as of mid-November 2008, intentions of unvaccinated individuals to be vaccinated during the remainder of the season, and reasons for not having been vaccinated.
Detailed Tables — 2008
This supplementary document provides point estimates, 95% confidence intervals corresponding to the figures presented in the occasional paper, and information about sample sizes and completion rates.
Vaccine Recommendations — 2008
2008 recommendations by Center for Disease Control and Prevention's Advisory Committee on Immunization Practices (ACIP) regarding the indicated use of influenza vaccine.
View Recommendations from Centers for Disease Control and Prevention
Methodology
Survey Instrument— 2008
Online questionnaire administered to survey respondents.
View Survey at Knowledge Networks
Methodology Paper — 2008
Brief description of the survey and sampling methodology used by Knowledge Networks.
View PDF at Knowledge Networks
This survey was conducted with the funding and support of GlaxoSmithKline (GSK). The findings have been subject to RAND's rigorous quality assurance process and RAND alone is responsible for the content.
Reference
[1] Fiore, A.E., et al., Prevention and control of influenza: recommendations of the Advisory Committee on Immunization Practices (ACIP), 2008. MMWR Recomm Rep, 2008. 57(RR-7): p. 1–60. High-risk health conditions include diabetes, heart disease, chronic lung disease, asthma, immune system problems, kidney disease, sickle cell disease, and hemophilia.
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