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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.

What's New on the H1N1 Flu Site

You can also keep up with CDC updates on H1N1 flu by signing up for email updates, subscribing to RSS, or following us on Twitter. For Past RSS Feeds, please go to the What's New Page Archive.

 
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