The latest cluster of mumps cases in Mclean County is at Heartland Community College in Normal. Cathy Coverston-Anderson is Assistant Director at the Heath Department. She says four cases have been confirmed, and there will likely be more.
There is a 12 to 25 day incubation period. So, the cases we see now were infected two weeks ago. Because of that long incubation period we expect to see some more."
"With mumps you are infectious two days before you start to show symptoms."