A mumps outbreak at San Diego State University has grown to include 15 total cases, according to updated figures from county health authorities.

The outbreak now consists of 14 confirmed infections and one probable case, based on data collected through the end of September. County officials initially disclosed the campus outbreak in mid-September.

Mumps is a contagious viral illness that typically causes swelling of the salivary glands, fever, and headache. The virus spreads through respiratory droplets and close contact with infected individuals.

Health officials continue to monitor the situation at the university campus as they work to contain further spread of the illness among students and staff.