Health officials say cases of the flu are building in Illinois. The US Centers for Disease Control say that the flu is showing up on a regional basis throughout the state – that’s one step away from being called widespread.
Flu activity typically begins building in the U.S. in December, although the peak typically isn't seen until sometime between January and March.
Last year, more than 600 people were admitted to Illinois intensive care units with the flu. At least 96 died.