Public health officials want parents and students to be aware of a whooping cough outbreak in Champaign County.
There are seven confirmed pertussis -- or whooping cough -- cases in Champaign County schools, with 27 since October. Most involve high school students.
Dr. Arwais Vaid, epidemiologist for the Champaign-Urbana Public Health District, explained pertussis vaccines tend to wear off in children around 12 years of age. "So a lot of times, boosters are required, and even with that booster, the vaccine does not provide 100% immunity," Vaid said.