The ill student doesn’t live on campus, the Whatcom County Health Department said, and fewer than 25 people may have been exposed.
The health department and Western have notified people who may have been exposed to the student.
Washington is in the midst of a statewide mumps outbreak that has sickened at least 847 people since October, according to the state Department of Health.
The last time the state saw this number of cases was in 1976, when there were 946, according to state health officials. Last year, there were 155 mumps cases statewide.
Mumps, caused by a virus, is contagious.
The MMR – measles, mumps and rubella – vaccine is the best way to prevent it, health officials said.