Google Flu Trends tracks how many people are searching for queries like "flu symptoms" and compiles the data by zip code. Assuming most people searching for "flu symptoms" are sick or know someone who is, Google then tells us what parts of the country are experiencing major flu problems and what parts appear to be safe.
For example, we're currently in New Hampshire, where Google reports flu activity is "low." But this weekend we're headed down to DC for Barack's big show and the flu activity is... Moderate! Abort travel plans! Stay home!
There's even an iPhone app in case you forget to check before you hit the road.
Related Stories:
· Flu Trends [Google]
· Cold & Flu Companion Application for Mobile Phones [Zicam]
· Inauguration Travel coverage [Jaunted]
[Photo: petroleumjeliffe]

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