YPSILANTI, Mich. (WXYZ) - The Washtenaw County Health Department says it has seen an outbreak of pertussis this year.
There have been 104 confirmed or probable cases of the highly contagious respiratory disease reported in the county.
"That's about four times an average or typical year," said Susan Cerniglia, a spokeswoman for the department.
Much of the awareness often focuses on infants, who are the most vulnerable. This year, however, the disease is hitting teens. Roughly 70 percent of the cases have been among children ages 10-19.
You should call your doctor if you have an unusual cough that lasts more than seven days, a cough that comes in bursts, or if a coughing spell is followed by vomiting.