University of Southern California (USC) students, infected with the contagious gastrointestinal organism, norovirus, numbered 330 in five days, university officials reported Tuesday.

Lawrence Neinstein, executive director of the University Park Health Center stated that similar outbreaks usually begin to recede after five days. Although he is optimistic, he states that USC “will remain vigilant because of the highly contagious nature of the virus.”

Symptoms of the norovirus include vomiting diarrhea and stomach cramps, and last about two days.

Students who have been infected are encouraged to rest and increase fluid intake. Those who are not feeling well should avoid socializing. All students and staff are reminded to wash their hands frequently, use hand sanitizers (gels or wipes) and refrain from sharing work stations, food and beverages.

USC officials stated that campus restrooms and common areas of residence halls have been thoroughly cleaned, and they are outreaching to university owned housing and fraternity and sorority row.

Students, parents and community residents with concerns should contact the Department of Public Safety for more information at (213) 740-4321.