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From Discovery News - Top Stories:
Last January several hundred bleary eyed students filed into an unnamed American high school to accept an unusual assignment: wear a matchbox-sized device around their neck for the day.
As the students passed each other in the halls, lined up for lunch, and listened to their teachers and administrators (who also sported the boxy jewelry), the devices recorded every encounter, or occasion when the devices came within 10 feet of each other. Ten feet is considered the maximum distance that spit, phlegm, or snot infected with influenza can travel.
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Re: Busy High School Model Shows How Diseases Spread
