(Champaign, IL) — School leaders in Champaign County are working with the local public health department to find the cause of a whooping cough outbreak. The Champaign-Urbana Public Health District yesterday said that they’ve confirmed 27 cases of whooping cough, also known as pertussis, since mid-October. So far this year 40 kids have gotten sick. Rantoul High School has the most cases so far, with 20 confirmed cases in 2017.