How Swine Flu Spread

Source: Brandon Keim, Wired Science, September 10, 2009

By analyzing the mutations in swine flu samples, scientists have assembled the most complete model to date of the pandemic’s birth.

Traditional modeling — the pins-on-a-map approach — relies on formal reports of a disease. Although these convey the big picture, they don’t always give a clear picture of how the disease spread.

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