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Content on this page was developed during the 2009-2010 H1N1 pandemic and has not been updated.

  • The H1N1 virus that caused that pandemic is now a regular human flu virus and continues to circulate seasonally worldwide.
  • The English language content on this website is being archived for historic and reference purposes only.
  • For current, updated information on seasonal flu, including information about H1N1, see the CDC Seasonal Flu website.

General Information About 2009 H1N1 Vaccines

This season, vaccines to protect against the 2009 H1N1 virus (sometimes called “swine flu”) have been produced. Like seasonal flu vaccines, there are two kinds of 2009 H1N1 vaccines: a "flu shot "; that is given with a needle, usually in the arm; and a nasal spray flu vaccine. The same manufacturers that produce seasonal flu vaccines also produced the vaccines against the pandemic 2009 H1N1 virus in the same way that the seasonal vaccines are made. Vaccines to protect against 2009 H1N1 are widely available. CDC is now encouraging everyone to get vaccinated against 2009 H1N1, including people 65 years and older. Learn More…

Vaccine Fact Sheets

Explains the benefits and risks of the vaccines, as well as who should get vaccinated.

Questions and Answers about 2009 H1N1 Vaccines

Information for Specific Groups

Supply and Distribution

Vaccine Safety and Monitoring

Social Media for 2009 H1N1 Vaccination

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