Tracking the flu

For years, the U.S. Centers for Disease Control and Prevention has recommended that people stay home and isolate themselves when they get the flu to keep it from spreading. But there was never a study to back up that advice – until now.

Allison Aiello, an epidemiologist at the University of North Carolina at Chapel Hill, and Katherine Heller, a statistician at Duke University, teamed up to study how the flu spreads among college students.

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