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| County | State | Risk Factor Score |
|---|
| Effingham County | Illinois | 2 |
| Jasper County | Illinois | 2 |
| McHenry County | Illinois | 3 |
| Essex County | New York | 3 |
| Botetourt County | Virginia | 3 |
| Bond County | Illinois | 3 |
| Hanover County | Virginia | 3 |
| Roanoke County | Virginia | 3 |
| Cumberland County | Illinois | 3 |
| Tazewell County | Illinois | 3 |
| Hunterdon County | New Jersey | 3 |
| Livingston County | New York | 4 |
| Adams County | Illinois | 4 |
| Clark County | Illinois | 4 |
| Hancock County | Illinois | 4 |
| Iroquois County | Illinois | 4 |
| Ogle County | Illinois | 4 |
| Union County | Pennsylvania | 4 |
| Salem City | Virginia | 4 |
| Clinton County | Illinois | 4 |
| Henderson County | Illinois | 4 |
| Moultrie County | Illinois | 4 |
| Putnam County | Illinois | 4 |
| Stark County | Illinois | 4 |
| Tioga County | New York | 4 |
| Wayne County | New York | 4 |
| Fluvanna County | Virginia | 4 |
| Mathews County | Virginia | 4 |
| Poquoson City | Virginia | 4 |
| Bedford County | Virginia | 4 |
| Powhatan County | Virginia | 4 |
| Woodford County | Illinois | 4 |
| Goochland County | Virginia | 4 |
| St. Croix County | Wisconsin | 5 |
| Portage County | Wisconsin | 5 |
| Williamson County | Illinois | 5 |
| Clinton County | New York | 5 |
| Armstrong County | Pennsylvania | 5 |
| Frederick County | Virginia | 5 |
| Grant County | Wisconsin | 5 |
| Clearfield County | Pennsylvania | 5 |
| Culpeper County | Virginia | 5 |
| Marinette County | Wisconsin | 5 |
| Clay County | Illinois | 5 |
| Chesterfield County | Virginia | 5 |
| Grundy County | Illinois | 5 |
| Henry County | Illinois | 5 |
| Johnson County | Illinois | 5 |
| Randolph County | Illinois | 5 |
| Ocean County | New Jersey | 5 |
| Lewis County | New York | 5 |
| Juneau County | Wisconsin | 5 |
| Lafayette County | Wisconsin | 5 |
| Jersey County | Illinois | 5 |
| Jo Daviess County | Illinois | 5 |
| Monroe County | Illinois | 5 |
| Hamilton County | New York | 5 |
| Herkimer County | New York | 5 |
| Highland County | Virginia | 5 |
| Louisa County | Virginia | 5 |
| Carroll County | Illinois | 5 |
| Piatt County | Illinois | 5 |
| Burlington County | New Jersey | 5 |
| Gloucester County | Virginia | 5 |
| New Kent County | Virginia | 5 |
| Ozaukee County | Wisconsin | 5 |