Dr. Robert Palinkas, who directs the campus' McKinley Health Center reports that all the students were vaccinated against mumps. However, the vaccine - included in the measles, mumps and rubella shots - are effective only 80 to 85 percent of the time.
Mumps is a highly contagious virus that tends to spread rapidly among susceptible persons in very close quarters. The incubation period is 14-25 days from exposure to the actual onset of symptoms. Persons are considered contagious from approximately three days before through five days after their symptoms begin. Symptoms tend to decrease after one week and generally resolve after ten days.
The Illinois Department of Public Health says 65 other cases have been confirmed this year. Most are in Morgan and Sangamon counties in central Illinois.