An outbreak of norovirus has put at least 85 students at Georgetown University in sick bay this week.

The affected students live at the Foggy Bottom and Mount Vernon campuses in Washington, and in off-campus apartments, and so far they haven't found a common link.

There have also been recent norovirus outbreaks at Princeton, and at Ryder College, also in New Jersey. Symptoms include nausea, vomiting and diarrhea.  Most victims recover in a couple of days.