Follow the money to follow the virus

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Avian flu spread follows finances: “Thanks to the website www.wheresgeorge.com — which traces the travels of money around the country and around the world — University of California, Santa Barbara researcher Lars Hufnagel has developed a model of how infectious diseases spread locally, from person to person, as well as from city to city.” (Discover)

I have long been aware of ‘Where’s George?’, linked to it here a long time ago, considered it a fun novelty, and actually entered several bills into its database to track. Imagine my surprise to see it put to this innovative use.