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National Immunization Survey

Information about the National 2009 H1N1 Flu Survey

What is the purpose of this study?

  • The data collected from households like yours will help local, state and federal health care agencies evaluate influenza (flu) vaccination coverage and what Americans think about the current pandemic of swine flu, also known as the 2009 H1N1 flu virus.
  • Health care agencies will use the data to increase vaccination rates and monitor resources across the country.
  • This study will help researchers better understand why some people choose not to get vaccinated against the flu.

How are households chosen?

Households are scientifically selected to represent the US population. The Centers for Disease Control and Prevention (CDC) depends on the help of households like yours to find out what Americans know about seasonal flu and H1N1 (swine) flu vaccinations. Participation is voluntary; however, without your help, your community may not be adequately represented in this important study on flu vaccinations.

Who is funding this survey?

It is funded by the Centers for Disease Control and Prevention (CDC), a federal governmental agency headquartered in Atlanta, Georgia

How is my information protected?

Confidentiality is mandated by federal law. Information that identifies you (or your household) will never be given to a company trying to sell products or services to you. All data we collect from you will remain confidential under federal law and you can skip any questions that you don’t want to answer. If you have any questions about your rights as a study participant, you may call Kathleen Parks, the NORC IRB Administrator, toll free, at 1-866-309-0542. If you would like more information about confidentiality and related federal laws that ensure the protection of your information, please see: How NCHS Protects Your Privacy

Who else is participating?

We are calling households from all across the country to interview an adult about vaccinations and related health issues.

What is Swine flu? What is a pandemic? Are we in a pandemic now?

The 2009 H1N1, or “swine flu” virus, is a new influenza virus causing illness in people. It is different from the “seasonal” influenza virus. The 2009 H1N1 virus was first detected in the United States in April 2009. It has spread from person-to-person worldwide, probably in much the same way that regular seasonal influenza viruses spread.

A pandemic is a worldwide outbreak of an illness that can spread from person to person. The new H1N1 (swine) flu became a pandemic in June 2009.

Who is NORC at the University of Chicago?

NORC at the University of Chicago is a not-for-profit research organization that has been conducting social science research for over 60 years. It has been contracted to conduct the National 2009 H1N1 Flu Survey for the Centers for Disease Control and Prevention.

Why are you calling my cell phone?

We need accurate, up-to-date information about flu vaccinations from everyone. Since many people only use their cell phones to make and get calls, we want to make sure we include these people too.

Contact Information

National 2009 H1N1 Flu Survey Toll free number: 1-800-993-0495
CDC 2009 H1N1 Flu (Swine Flu) Website:
CDC Seasonal Flu Website:
CDC INFO Contact Center: 1-800-CDC-INFO (1-800-232-4636)
NCHS Ethics Review Board: 1-800-223-8118
protocol #2006-04, amendment 52


National Immunization Survey graphic

Contact Us:
  • National Center for Health Statistics
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  • 1 (800) 232-4636
    TTY: 1 (888) 232-6348
  • Contact CDC–INFO
  • Page last reviewed: November 6, 2015
  • Page last updated: October 4, 2011
  • Content source: CDC/National Center for Health Statistics
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