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Protecting Yourself Against H1N1 (Swine Flu)


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Illinois FLu Hotline for non-medical questions 866-848-2094 English 866-241-2138 Español

www.flu.gov
U.S. Department of
Health & Human Services’
influenza Web site

Illinois H1N1 Flu Case Summary
Counties Confirmed and Probable Cases Deaths
42 3,425 17

Illinois Cases of H1N1 Flu by County
(As of July 31, 2009, 10 a.m.)
Updated
on Fridays
City or
County
# of
Probable Cases
# of
Confirmed Cases
Total
Boone - 10 10
Champaign - 1 1
Chicago 9 1,574 1,583
Coles - 1 1
Cook 17 972 989
DeKalb - 2 2
DeWitt - 1 1
DuPage - 147 147
Effingham - 2 2
Fayette - 1 1
Franklin - 2 2
Grundy - 2 2
Henry - 2 2
Jackson - 1 1
Jo Daviess - 1 1
Kane 5 86 91
Kankakee 1 28 29
Kendall - 6 6
Knox - 3 3
Lake 5 249 254
LaSalle - 8 8
Madison - 5 5
McDonough - 3 3
McHenry - 14 14
McLean - 2 2
Mercer 1 2 3
Monroe - 1 1
Ogle - 4 4
Peoria - 3 3
Piatt - 1 1
Putnam - 1 1
Richland - 2 2
Rock Island - 24 24
Sangamon - 3 3
St. Clair - 4 4
Stephenson - 3 3
Tazewell - 1 1
Union - 1 1
Warren - 2 2
Whiteside - 2 2
Will - 152 152
Williamson - 5 5
Winnebago - 47 47
Undetermined - 6 6
Total 38 3,387 3,425

Locations may change as the result of additional information obtained through case investigations.

A confirmed case is defined as a person with an acute febrile respiratory illness with laboratory confirmed infection.

A probable case is defined as a person with an acute febrile respiratory illness who is positive for influenza A, but negative for H1 and H3.

The reported number of " probable and confirmed" cases do not reflect the overall incidence of H1N1 influenza in Illinois because CDC and the Illinois Department of Public Health are not emphasizing testing of patients with mild illness. Most individuals with novel influenza H1N1 infection have mild illness and are not being tested.

Since the number of Illinois cases listed represent a weekly update, the totals may not always be consistent with those reported by local health departments. If there is a discrepancy between the state and local health department counts, data from the local health departments should be used as the most accurate number.

  Flu View - A weekly influenza surveillance report


Illinois Department of Public Health | 535 West Jefferson Street | Springfield, Illinois 62761
Phone 217-782-4977 | Fax 217-782-3987 | TTY 800-547-0466