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Byline: Gretchen Reynolds
Elizabeth Halloran gestures toward her laptop screen. A trim, blonde professor of biostatistics, she knows as much about the behavior of influenza as anyone on earth. "Watch the dots," she says, her voice bright with enthusiasm. "Those represent people being infected. You start with one case of flu entering the country"-she points at a single dot-"then that person infects other people, and they infect others, and then the epidemic really starts to takes hold. Watch."
On her PowerBook, an apocalypse unfolds. Yellow dots begin to engulf a map of Southeast Asia, the tiny Crayola daubs racing from coast to coast and border to ...