My son's Junior year at Hope College in Holland, Michigan was interupted last Friday when the Ottowa County Board of Health closed the school because of a noro-virus outbreak. Some friends from our area were visiting the college that day and gave Gary a lift home, where he has stayed noro-free--for which we are inexpressibly grateful! In his spare time waiting for the re-opening of campus, he threw together a little computer expression of the contagion.
You can find it for download here: http://www.bensonbasement.com/misc/hope-college-norovirus-simulator/#comments.
Follow the directions to run the simulation. It should take about a minute to run. (Remember: the programmer is in college).