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Week 6: Regional
ILI: 3.1%
56% positive for influenza
There was one influenza-associated Intensive Care Unit (ICU) admission reported for week 6.
No influenza-associated pediatric deaths were reported for week 6.
During week 6, two influenza outbreaks were reported in long-term care facilities.
Week 7: Regional
During CDC Week 7, the proportion of outpatient visits for influenza-like illness (ILI) was 2.6% compared with 3.0% for week 6.
During week 7, three of the four specimens tested by Illinois Department of Public Health Laboratory were positive for influenza.
There were three influenza-associated Intensive Care Unit (ICU) admission reported for week 7.
No influenza-associated pediatric deaths were reported for week 7.
During week 7, one influenza outbreak was reported in long-term care facilities.
Week 8: Widespread
ILI: 3%
77% positive for influenza
There were four influenza-associated Intensive Care Unit (ICU) admission reported for week 8.
No influenza-associated pediatric deaths were reported for week 8.
During week 8, one influenza outbreak was reported in long-term care facilities. During week 8, the first oseltamivir resistant H1N1 virus was detected in the U.S. during the 2011-2012 influenza season (this case was an Illinois resident).
Week 9: Widespread
ILI: 2.51%
During week 9, twenty-three (83%) of the thirty specimens tested by Illinois Department of Public Health Laboratory were positive for influenza. Of the 25 that tested positive, 12 (48%) were characterized as 2009 (A) H1N1, 12 (48%) were Influenza A (H3) and 1 (4%) was Influenza B.
There were two influenza-associated Intensive Care Unit (ICU) admission reported for week 9.
No influenza-associated pediatric deaths were reported for week 9.
During week 9, five influenza outbreaks were reported in long-term care facilities in regions the Peoria, Edwardsville, West Chicago, and Chicago/Cook County Regions of Illinois
During week10, twelve (40%) of the thirty specimens tested by Illinois Department of Public Health
Laboratory were positive for influenza. Of the twelve that tested positive, 4 (33%) were characterized
as 2009 (A) H1N1 and 8 (67%) were Influenza A (H3).
There were fourteen influenza-associated Intensive Care Unit (ICU) admission reported for week 10.
No influenza-associated pediatric deaths were reported for week 10.
During week 10, five influenza outbreaks were reported in long-term care facilities in regions the
Rockford (1), Peoria (2), Edwardsville (4), West Chicago (7), and Chicago/Cook County (8) Regions
of Illinois (see IDPH, Immunization Section Regional Map).
Week 11: Widespread
ILI: 3.3%
76% positive for influenza: all A
There were nine influenza-associated Intensive Care Unit (ICU) admission reported for week 11.
No influenza-associated pediatric deaths were reported for week 11.
During week 11, seven influenza outbreaks were reported in long-term care facilities in regions the
Rockford (1), Edwardsville (4), Marion (5), West Chicago (7), and Chicago/Cook County (8) regions of
Illinois (see IDPH, Immunization Section Regional Map).
Week 12: Regional
ILI: 2.7%
56% positive for influenza
There were four influenza-associated Intensive Care Unit (ICU) admission reported for week 12.
No influenza-associated pediatric deaths were reported for week 12.
During week 12, two influenza outbreaks were reported in long-term care facilities in the Edwardsville and West Chicago regions of Illinois
Week 13: Regional
8 new hospitalizations
ILI: 1.7%
36% positive for influenza: A(H3)
During week 13, two influenza outbreaks were reported in long-term care facilities in Chicago/Cook
County (8) region of Illinois (see IDPH, Immunization Section Regional Map).
Week 15: Sporadic
4 new hospitalizations
ILI: 1.8%
25% positive for influenza: A(H3)
During week 15, one influenza outbreak was reported in a long-term care facility in the Chicago/Cook (8) region
Week 16: Sporadic
No new hospitalizations
ILI: 1.9%
No positives for influenza
During week 16, three influenza outbreaks were reported in long-term care facilities within the Peoria (2) and West Chicago (7) regions; total 36
No deaths have been reported this season.
Week 17: Sporadic
One influenza-associated Intensive Care Unit (ICU) admission was reported for week 17; total 17
No influenza-associated pediatric deaths were reported for week 17.
During week 17, one influenza outbreak was reported in a long-term care facility within the West Chicago (7) region; total 37
Week 18: Sporadic
ILI: 1.4%
No positives for influenza
Six influenza-associated Intensive Care Unit (ICU) admission were reported for week 18.
No influenza-associated pediatric deaths were reported for week 18.
During week 18, one influenza outbreak was reported in a long-term care facility within the West Chicago (7) region.
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