*These data are provisional and may be revised or adjusted in the future.
Cumulative Sentinel** Infections by County - Illinois, 2003
| Adams County | 2 |
| Bond County | 2 |
| Bureau County | 1 |
| Cass County | 1 |
| DeKalb County | 1 |
| DuPage County | 1 |
| Fayette County | 1 |
| Ford County | 1 |
| Greene County | 1 |
| Hamilton County | 1 |
| Henderson County | 1 |
| Henry County | 1 |
| Jefferson County | 1 |
| Kankakee County | 1 |
| Kendall County | 1 |
| Knox County | 1 |
| La Salle County | 2 |
| Lee County | 3 |
| Logan County | 2 |
| Macoupin County | 1 |
| Madison County | 2 |
| Marion County | 2 |
| McLean County | 2 |
| Menard County | 1 |
| Morgan County | 2 |
| Rock Island County | 1 |
| Saline County | 1 |
| Schuyler County | 2 |
| Shelby County | 1 |
| Tazewell County | 1 |
| Wabash County | 1 |
| Washington County | 2 |
| Wayne County | 1 |