Explore flu trends - United States

We've found that certain search terms are good indicators of flu activity. Google Flu Trends uses aggregated Google search data to estimate flu activity. Learn more »

National
2009-2010 Past years ▼
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Estimates were made using a model that proved accurate when compared to historic official flu activity data. Data current through November 19, 2009.

Fight influenza

CDC urges you to take these steps to protect yourself and others from the flu:

  1. Get vaccinated against flu.
  2. Wash hands often, cover your cough.
  3. Take antiviral drugs if your doctor recommends them.

This flu season could be worse than prior years. A new flu virus called 2009 H1N1 is spreading worldwide. Take these 3 steps to protect against the new flu, too.

CDC logo.Centers for Disease Control and Prevention