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Department of Health and Human Services
Centers for Disease Control and Prevention


Vaccines & Immunizations

Vaccines and Preventable Diseases:

Seasonal Influenza (Flu) Vaccination
Pronounced (in-floo-EN-za)

The single best way to protect against the flu is to get vaccinated each year. There are two types of vaccines:

1. The "flu shot"— an inactivated vaccine (containing killed virus) that is given with a needle, usually in the arm. The flu shot is approved for use in people older than 6 months, including healthy people and people with chronic medical conditions. More...

2. The nasal-spray flu vaccine — a vaccine made with live, weakened flu viruses that do not cause the flu (sometimes called LAIV for “live attenuated influenza vaccine” or FluMist®). LAIV (FluMist®) is approved for use in healthy* people 2-49 years of age† who are not pregnant. More...

The viruses in the vaccine change each year based on international surveillance and scientists' estimations about which types and strains of viruses will circulate in a given year.

Flu vaccination

See also H1N1 Flu Vaccination.

What You Should Know

About the Disease

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Vaccine Information

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Beliefs & Concerns about Influenza Vaccines

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Vaccine Safety

As with all vaccines, there can be minor reactions, including pain and redness at the injection site, headache, fatigue or a vague feeling of discomfort.

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Who Should Not be Vaccinated?

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For Health Professionals

Clinical Information on Influenza

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Vaccine Supply, Distribution and Storage

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Coverage Levels, Safety and Composition

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Recommendations for Influenza Vaccination

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Vaccine Administration

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References and Resources

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Provider Education

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Materials for Patients

*"Healthy" indicates persons who do not have an underlying medical condition that predisposes them to influenza complications.

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This page last modified on February 4, 2010
Content last reviewed on September 17, 2009
Content Source: National Center for Immunization and Respiratory Diseases

Quick Links

Also Known As

Don't get the flu.  Don't spread the flu. Get Vaccinated. www.cdc.gov/flu

Safer Healthier People

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Vaccines and Immunizations