The following chart was made from the IDPH web site. The chart shows 3 of the 21 counties that make up 88% of the increase of cases from the past week. I have done this just to see what is happening in our so called region of the State of ILLinois. You can download the file below if you like. The PDF is 2 pages so you can see more info that was used.
I just updated info for the Central Area of the State. It shows 5 of 38 counties make up 80% of the increase of cases. You can also say 13% of the counties make up 80% of the cases.