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Week 40: ILI 1.9% There was one influenza related Intensive Care Unit (ICU) admission and no deaths reported for week 40.
Week 41: ILI 1.8%
Week 42: ILI 1.6% Febrile Respiratory Illness (FRI) surveillance at Naval Recruit Training Command, Great Lakes for this week is substantially elevated.
During week 42, none of the specimens tested by Illinois Department of Public Health Laboratory were positive for influenza A or B.
No influenza-associated Intensive Care Unit (ICU) admissions were reported for week 42. This represents no change from the previous week.
No influenza-associated pediatric deaths were reported for week 42. This represents no change from week 41.
On October 19th, 2011 a suspected influenza like illness [ILI] outbreak in a DuPage County elementary school was reported. Increased absenteeism was reported in one of the first grade classroom with 17 of 28 (61%) students ill. Siblings of the students in this first grade classroom are now beginning to display ILI symptoms. IDPH has sent test kits to the DuPage County Health Department for confirmation. http://www.idph.state.il.us/flu/fluupdate11-12.htm
Re: Illinois 2011-2012 Flu Season: Weeks 40-44 (No Activity)
Re: Illinois 2011-2012 Flu Season: Weeks 40-44 (No Activity)
Week 43: No Activity
ILI: 1.5%
No positives for influenza detected DuPage County ILI Update:
On October 19, 2011 a suspected influenza like illness (ILI) outbreak in a DuPage County elementary school was reported to IDPH. Increased absenteeism was reported in one of the first grade classrooms with peak absenteeism in 11 of 28 (39%) students ill on October 6. A total of 32 of 696 (5%) students at the school in multiple classrooms were associated with the cluster, and absenteeism is currently at baseline levels. There were no reported cases of hospitalization or staff illness, and surveillance is ongoing.
Week 44: No Activity
ILI: 1.7% compared with 1.5% for week 43.
Febrile Respiratory Illness (FRI) surveillance at Naval Recruit Training Command, Great Lakes for week 44 is moderately elevated.
During week 44, none of the specimens tested by Illinois Department of Public Health Laboratory were positive for influenza A or B. http://www.idph.state.il.us/flu/fluupdate11-12.htm
Re: Illinois 2011-2012 Flu Season: Weeks 40-46 (No Activity)
Re: Illinois 2011-2012 Flu Season: Weeks 40-46 (No Activity)
Week 46: Sporadic
ILI: 1.5%
During week 46, three of the specimens tested by Illinois Department of Public Health Laboratory were positive for influenza B.
There were no influenza-associated Intensive Care Unit (ICU) admissions reported for week 46.
No influenza-associated pediatric deaths were reported for week 46.
During week 46, one influenza B outbreak was reported in a long term care facility. http://www.idph.state.il.us/flu/fluupdate11-12.htm
Week 47: Sporadic
ILI: 2.2%
During week 47, five of the specimens tested by Illinois Department of Public Health Laboratory were
positive for influenza B.
There were no influenza-associated Intensive Care Unit (ICU) admissions3
reported for week 47.
No influenza-associated pediatric deaths were reported for week 47.
During week 47, no influenza outbreaks were reported. http://www.idph.state.il.us/flu/fluupdate11-12.htm
Re: Illinois 2011-2012 Flu Season: Weeks 40-48 (No Activity)
Re: Illinois 2011-2012 Flu Season: Weeks 40-48 (No Activity)
Week 48: No Activity
During CDC Week 48, the proportion of outpatient visits for influenza-like illness (ILI)was 1.2% compared with 2.0% for week 47.
Febrile Respiratory Illness (FRI) surveillance at Naval Recruit Training Command, Great Lakes for week 48 is at or below expected value.
During week 48, none of the specimens tested by Illinois Department of Public Health Laboratory were positive for influenza.
There were no influenza-associated Intensive Care Unit (ICU) admissions reported for week 48.
No influenza-associated pediatric deaths were reported for week 48.
During week 48, no influenza outbreaks were reported. http://www.idph.state.il.us/flu/fluupdate11-12.htm
Week 52: Sporadic
No new hospitalizations; total 2
ILI: 2.7% (continued elevation in age-group 0-4 years)
22% positive for influenza (A/H3)
No deaths or outbreaks reported http://www.idph.state.il.us/flu/fluupdate11-12.htm
Week 3: Sporadic
1 new hospitalizations; total 5
ILI: 1.8%
60% positive for influenza 2009A/H1N1, A/H3, A and B
One outbreak reported in long-term health facility http://www.idph.state.il.us/flu/fluupdate11-12.htm
Week 4: Sporadic
ILI: 1.7%
50% positive for influenza
There was one influenza-associated Intensive Care Unit (ICU) admission reported for week 4.
No influenza-associated pediatric deaths were reported for week 4.
During week 4, no influenza outbreaks were reported. http://www.idph.state.il.us/flu/fluupdate11-12.htm
Week 5: Regional
ILI: 2.1%
During week 5, none of the four specimens tested by Illinois Department of Public Health Laboratory were positive for influenza. During week 5, eleven specimens positive for Influenza A via rapid influenza testing were reported to the Immunization Section.
There was no influenza-associated Intensive Care Unit (ICU) admission reported for week 5.
No influenza-associated pediatric deaths were reported for week5.
During week 5, two influenza outbreaks were reported in long-term care facilities. http://www.idph.state.il.us/flu/fluupdate11-12.htm
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. http://www.idph.state.il.us/flu/fluupdate11-12.htm
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. http://www.idph.state.il.us/flu/fluupdate11-12.htm
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). http://www.idph.state.il.us/flu/fluupdate11-12.htm
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 http://www.idph.state.il.us/flu/fluupdate11-12.htm
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). http://www.idph.state.il.us/flu/fluupdate11-12.htm
