Google Flu Trends uses Google search trends to track and warn people about the spread of communicable diseases.

Currently it only provides US based trends for influenza, but Google plans to make it available world-wide for more diseases.

You may also like:

  1. Google Trends meets Wikipedia
  2. Navigate Google Hot Trends with Bing
  3. Should you use Google Trends to Estimate Site Traffic?
  4. Website Traffic Charts at Google Trends – Are They Accurate?
  5. Explore Baby Name Trends by Letters