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Washington 2009-2010 Flu Season

JimO

JimO

Well-known member
Source: http://www.doh.wa.gov/h1n1/h1n1_newsroom.htm

Monitoring H1N1: Hospitalizations and deaths

On September 19, 2009, the state Department of Health began reporting hospitalizations and deaths for all types of influenza ? not only H1N1 (swine flu). From April 26, 2009 to September 18, 2009 there were 174 hospitalizations and 16 deaths attributed to H1N1 (swine flu).

Updates will be posted on Friday at 3:00 p.m., and will include the total number of hospitalized and fatal cases of both H1N1 and seasonal flu in Washington. Mid-week updates will be posted as needed.

Hospitalizations and Deaths for all strains of influenza in Washington

Hospitalizations
(9/19 to 11/21/2009)
Deaths
(9/19 to 11/21/2009)

Western Washington residents
789
37

Eastern Washington residents
421
15

Total
1,210
52

Table updated 11/24/2009, 4:00 pm
 
Last edited by a moderator:
Re: Washington reports 73 total deaths

Re: Washington reports 73 total deaths

Source: http://www.doh.wa.gov/h1n1/h1n1_newsroom.htm

Monitoring H1N1: Hospitalizations and deaths

On September 19, 2009, the state Department of Health began reporting hospitalizations and deaths for all types of influenza ? not only H1N1 (swine flu). From April 26, 2009 to September 18, 2009 there were 174 hospitalizations and 16 deaths attributed to H1N1 (swine flu).

Updates will be posted on Friday at 3:00 p.m., and will include the total number of hospitalized and fatal cases of both H1N1 and seasonal flu in Washington. Mid-week updates will be posted as needed.

Hospitalizations and Deaths for all strains of influenza in Washington

Hospitalizations
(9/19 to 11/28/2009)
Deaths
(9/19 to 11/28/2009)

Western Washington residents
807
40

Eastern Washington residents
425
17

Total
1,232
57

Table updated 12/2/2009, 8:30 am
 
Re: Washington reports 86 total deaths

Re: Washington reports 86 total deaths

Source: http://www.doh.wa.gov/h1n1/h1n1_newsroom.htm

From April 26, 2009 to September 18, 2009 there were 174 hospitalizations and 16 deaths attributed to H1N1 (swine flu).

Deaths (9/19 to 12/19/2009)

Western Washington residents - 51

Eastern Washington residents - 19

Total - 70

Table updated 12/28/2009, 9:00 am
 
Re: Washington reports 91 total deaths

Re: Washington reports 91 total deaths

Source: http://www.doh.wa.gov/h1n1/h1n1_newsroom.htm

Monitoring H1N1: Hospitalizations and deaths

On September 19, 2009, the state Department of Health began reporting hospitalizations and deaths for all types of influenza ? not only H1N1 (swine flu). From April 26, 2009 to September 18, 2009 there were 174 hospitalizations and 16 deaths attributed to H1N1 (swine flu).

Weekly updates will be posted on Thursday mornings and will include the total number of hospitalized and fatal cases of both H1N1 and seasonal flu in Washington.

Hospitalizations and Deaths for all strains of influenza in Washington

Region - Hospitalizations (9/19/2009 to 1/2/2010) - Deaths (9/19/2009 to 1/2/2010)

Western Washington residents - 930 - 55

Eastern Washington residents - 443 - 20

Total - 1,373 - 75

Table updated 1/7/2010, 9:45 am
 
Re: Washington reports 91 total deaths

Re: Washington reports 91 total deaths

Week 52: (Seattle & King County)

• Emergency department (ED) visits for influenza like illness (ILI) held steady for the fourth consecutive week after declining for five consecutive weeks.
• Hospital admissions for laboratory-confirmed influenza have held steady for the past few weeks.
• Twelve long-term care facilities have reported cases of influenza like illness in their facilities since mid-October.

10% of deaths reported from 12/24/09 through 12/31/09 were attributed to pneumonia and influenza

2009-2010 Influenza Season (starting October 5th):
Lab-confirmed 2009 Influenza A H1N1 Hospitalizations: 262
Lab-confirmed 2009 Influenza A H1N1 Deaths: 16

2008-2009 Influenza Season (through October 4th):
Lab-confirmed 2009 Influenza A H1N1 Hospitalizations: 82
Lab-confirmed 2009 Influenza A H1N1 Deaths: 3
http://www.kingcounty.gov/healthservices/health/communicable/immunization/fluactivity.aspx
 
Re: Washington--Week 1 (1 new death)

Re: Washington--Week 1 (1 new death)

Week 1: (Seattle and King County)

* Emergency department (ED) visits for influenza like illness (ILI) held steady for the fifth consecutive week after declining for five consecutive weeks. Among ED patients with pneumonia, the percent of admissions for the week ending 1/9/10 was slightly elevated compared with the previous week.
* No influenza deaths occurred in King County residents during week 1. One death in a King County resident confirmed to have influenza A (not subtyped) occurred during week 52. The individual, an elderly woman, had underlying health conditions. Lab-confirmed 2009 Influenza A H1N1 Deaths: 17
* Thirteen long-term care facilities have reported cases of influenza like illness in their facilities since mid-October.

5.1% of deaths reported during week 1 were attributed to pneumonia and influenza. 10% of deaths reported during week 52 were attributed to pneumonia and influenza, above the national threshold of 7.5%. At the peak of flu season, the national epidemic threshold typically ranges from 7.5 ? 8.0%.
http://www.kingcounty.gov/healthservices/health/communicable/immunization/fluactivity.aspx
 
Re: Washington--Week 2

Re: Washington--Week 2

Week 2:
Summary: Washington State
? Influenza virus continues to circulate in Washington at a very low level.
? During January 10?16 (week 2), 1 fatal and 5 hospitalized laboratory-confirmed influenza cases were reported to the Department of Health (DOH). All 6 cases reside west of the Cascade Mountains. Since September 19th, 1380 hospitalized and 76 fatal cases have been reported to DOH.
? All subtyped influenza A viruses reported to CDC from Region X (Washington, Oregon, Idaho, and Alaska) during the past five weeks were 2009 influenza A (H1N1) viruses.
? The proportion of emergency room and outpatient visits for influenza-like illness (ILI) is similar to the proportion seen at this time last year. (2.3%)

14 (4.1%) of 342 deaths in Seattle, Spokane and Tacoma were due to P&I.
http://www.doh.wa.gov/EHSPHL/Epidemiology/CD/fluupdate.pdf

Seattle and King County:
? Emergency department (ED) visits for influenza like illness (ILI) held steady for the sixth consecutive week after declining for five consecutive weeks.
? Hospital admissions for laboratory-confirmed influenza have held steady for the past several weeks.
? No influenza deaths occurred in King County residents during week 2.
? The percentage of specimens testing positive for influenza from our outpatient surveillance system is in the same range as typically observed this time of year.
? The percentage of rapid antigen tests positive for influenza is below the average proportion observed this time of year.
? Thirteen long-term care facilities have reported cases of influenza like illness in their facilities since mid-October.

8.7% of deaths reported during week 2 were attributed to pneumonia and influenza.
http://www.kingcounty.gov/healthservices/health/communicable/immunization/fluactivity.aspx
 
Re: Washington--Week 3

Re: Washington--Week 3

Week 3:
Influenza virus continues to circulate in Washington at a very low level.
The proportion of outpatient visits for influenza-like illness (ILI) is below the regional baseline. (1.23%)
P&I: 4.4%
Washington State (updated 2/1/10): During week 3 (January 17-23, 2010), the geographic distribution of influenza like illness (ILI) was sporadic. The synopsis for week 4 is not yet available. The synopsis below reflects data from week 3.
• Influenza virus continues to circulate in Washington state at a very low level.
• From September 19, 2009 to January 23, 2010, the Department of Health (DOH) received reports of 1,383 hospitalized and 76 fatal cases of laboratory-confirmed influenza.
• Almost all circulating influenza viruses in Washington are 2009 H1N1 viruses. Influenza B infections have been sporadically reported over the past several weeks.
• The proportion of emergency department and outpatient visits for influenza like illness is below the regional baseline.
http://www.doh.wa.gov/EHSPHL/Epidemiology/CD/fluupdate.pdf

76 deaths (9/19/09-present) 16 prior : Total deaths 92
http://www.doh.wa.gov/h1n1/h1n1_newsroom.htm

Seattle & King County
Emergency department (ED) visits for influenza like illness (ILI) held steady for the seventh consecutive week after declining for five consecutive weeks.
10.9% of deaths reported during week 3 were attributed to pneumonia and influenza.
http://www.kingcounty.gov/healthservices/health/communicable/immunization/fluactivity.aspx
 
Re: Washington--Week 4 No new deaths (total 92)

Re: Washington--Week 4 No new deaths (total 92)

Week 4: sporadic

No new deaths

Seattle & King County
Emergency department (ED) visits for influenza like illness (ILI) held steady for the eighth consecutive week after declining for five consecutive weeks.

4.7% of deaths reported during week 4 were attributed to pneumonia and influenza.
http://www.kingcounty.gov/healthservices/health/communicable/immunization/fluactivity.aspx
 
Re: Washington--Week 5 No new deaths (total 92)

Re: Washington--Week 5 No new deaths (total 92)

Week 5: Low activity

For State:
Positive speciment: under 5% (increasing)
The proportion of outpatient visits for influenza-like illness (ILI) has increased over the past two weeks but remains below the state baseline. This increase is likely due to non-influenza pathogens.
Person hospitalized for Influenza B
http://www.doh.wa.gov/EHSPHL/Epidemiology/CD/fluupdate.pdf
Virology report: http://www.paml.com/Pages/Respiratory Report.aspx


Seattle and King County:
# Emergency department (ED) visits for influenza like illness (ILI) held steady for the ninth consecutive week after declining for five consecutive weeks.
# Hospital admissions for laboratory-confirmed influenza have held steady for the past several weeks.
# No influenza deaths occurred in King County residents during week 5.
# The percentage of specimens testing positive for influenza from our outpatient surveillance system is below the average proportion usually observed at this time of year.
# The percentage of rapid antigen tests positive for influenza is below the average proportion observed this time of year.

P%I remains low
Influenza B detected
Percent positive increasing
http://www.kingcounty.gov/healthservices/health/communicable/immunization/fluactivity.aspx
 
Re: Washington--Week 7 No new deaths (total 92)

Re: Washington--Week 7 No new deaths (total 92)

WEEK 7

? Influenza activity in Washington is very low.
? During February 14?20 (week 7), 5 hospitalized laboratory-confirmed influenza cases were reported to Department of Health. Of these patients, 3 had onset of illness during the past three weeks and were infected with influenza A (subtype unknown).
? During January 24?February 13 (weeks 4?6), 3 (0.6%) of the specimens tested by the World Health Organization/National Respiratory and Enteric Virus Surveillance System (WHO/NREVSS) collaborating laboratories in Region X (Washington, Oregon, Idaho, Alaska) were positive for influenza.
All three of these specimens were 2009 influenza A (H1N1) viruses.
? The proportion of outpatient visits for influenza-like illness (ILI) remains below the state baseline.
http://www.doh.wa.gov/EHSPHL/Epidemiology/CD/fluupdate.pdf

For Seattle and King County:
Emergency department (ED) visits for influenza like illness (ILI) held steady for the eleventh consecutive week.
http://www.kingcounty.gov/healthservices/health/communicable/immunization/fluactivity.aspx
 
Re: Washington--Week 8 Reports 2 earlier deaths (total 94)

Re: Washington--Week 8 Reports 2 earlier deaths (total 94)

Week 8:

Reports 2 deaths prior to the week 1. There were 16 prior to Sept19 and now 78 since Sept 19 for a total of 94.

Influenza activity in Washington continues to be low.
? The Department of Health has received reports of 12 hospitalized patients with lab-confirmed influenza who became ill in the past 4 weeks. Of these patients, 8 reside west and 4 reside east of the Cascade Mountains.
? During January 31?February 20 (weeks 5?7), 4 (0.4%) of the specimens tested by the World Health Organization/National Respiratory and Enteric Virus Surveillance System (WHO/NREVSS) collaborating laboratories in Region X (Washington, Oregon, Idaho, Alaska) were positive for influenza.
All four of these specimens were 2009 influenza A (H1N1) viruses.
? The proportion of outpatient visits for influenza-like illness (ILI) is 0.6 and remains below the state baseline.

P&I: 4.8%
http://www.doh.wa.gov/EHSPHL/Epidemiology/CD/fluupdate.pdf

Seattle and King County:
* Emergency department (ED) visits for influenza like illness (ILI) held steady for the twelfth consecutive week after declining for five consecutive weeks.
* No laboratory-confirmed influenza hospitalizations with onset after the week ending 2/6/10 have been reported. All laboratory-confirmed influenza hospitalizations with onset of illness in February have been influenza B.
* School absenteeism has been low and stable in recent weeks, with the majority of schools reporting <10% of students absent. Some schools were closed for all or part of the week ending 2/20/10. Average absenteeism increased for the week ending 2/20/10 for all schools but most markedly for high schools, a pattern seen during school breaks in the past.
http://www.kingcounty.gov/healthservices/health/communicable/immunization/fluactivity.aspx
 
Re: Washington--Week 9 Reports 1 earlier death (total 95)

Re: Washington--Week 9 Reports 1 earlier death (total 95)

Week 9:

On death reported from week of Jan31; 79 for season; total 95

Percent positive: 0.3% (increase) Influenza A; 1.8% (Influenza B)
ILI: 1% (increasing) Baseline is 3.8%
ILI: Western Washington - 1.14% (increasing)
ILI: Eastern Washington - 2% (increasing)

During CDC Week 8, 26 (7.2%) of 361 deaths in Seattle, Spokane and Tacoma were due to pneumonia or influenza (P&I).
http://www.doh.wa.gov/EHSPHL/Epidemiology/CD/fluupdate.pdf

Seattle and King County
# Emergency department (ED) visits for influenza like illness (ILI) have held steady for over three months, after declining from a peak in fall.
# No laboratory-confirmed influenza hospitalizations with onset after the week ending 2/6/10 have been reported. All laboratory-confirmed influenza hospitalizations with onset of illness in February have been influenza B.
# No laboratory-confirmed influenza deaths have occurred in King County residents since mid-February.
http://www.kingcounty.gov/healthservices/health/communicable/immunization/fluactivity.aspx
 
Re: Washington--Week 10 Reports (total 95)

Re: Washington--Week 10 Reports (total 95)

Week 10:

ILI: 0.7% (baseline 3.8%)
Percent positive: 0
P&I: 7.2%

Summary:
• Influenza activity in Washington is very low.
• The Department of Health has received reports of 5 hospitalized patients with lab-confirmed influenza who became ill in the past 4 weeks. Of these patients, 2 reside west and 3 reside east of the Cascade Mountains.
• During February 14–March 6 (weeks 7–9), 2 (0.2%) of the specimens tested by the World Health Organization/National Respiratory and Enteric Virus Surveillance System (WHO/NREVSS) collaborating laboratories in Washington were positive for influenza. Both of these specimens were
influenza A virus of unknown subtype.
http://www.doh.wa.gov/EHSPHL/Epidemiology/CD/fluupdate.pdf

Seattle and King County:
• Emergency department (ED) visits for influenza like illness (ILI) have held steady for over three months,
after declining from a peak in fall.
• One King County resident was hospitalized with laboratory-confirmed 2009 H1N1 influenza in week 10.
This was the first laboratory-confirmed influenza hospitalization with onset after the week ending 2/6/10,
and the first 2009 H1N1 hospitalization with onset since January. All three laboratory-confirmed
influenza hospitalizations with onset of illness in February were influenza B.
• No laboratory-confirmed influenza deaths have occurred in King County residents since mid-February.
• The percentage of specimens testing positive for influenza from our outpatient surveillance system is
below the average proportion observed at this time of year. (rising)
• School absenteeism has been low and stable in recent weeks, with the majority of schools reporting
<10% of students absent. Some schools were closed for all or part of the week ending 2/20/10.
Average absenteeism increased for the week ending 2/20/10 for all schools but most markedly for high
schools, a pattern seen during school breaks in the past.

P&I: 2.5%
http://www.kingcounty.gov/healthservices/health/communicable/immunization/fluactivity.aspx
 
Re: Washington--Week 11 Reports (total 95)

Re: Washington--Week 11 Reports (total 95)

Week 11:

• Influenza activity in Washington is very low.
• From September 19, 2009–March 20, 2010, DOH received reports of 1405 hospitalized and 79 deceased patients with laboratory-confirmed influenza. Five hospitalized patients with laboratory confirmed influenza became ill in the past 4 weeks. Of these patients, 4 reside west and 1 resides east of the Cascade Mountains.
• During February 14–March 6 (weeks 7–9), 2 (0.2%) of the specimens tested by the World Health Organization/National Respiratory and Enteric Virus Surveillance System (WHO/NREVSS) collaborating laboratories in Washington were positive for influenza. Both of these specimens were influenza A virus of unknown subtype.
• The proportion of outpatient visits for influenza-like illness (ILI) remains below the state baseline.
http://www.doh.wa.gov/EHSPHL/Epidemiology/CD/fluupdate.pdf

Seattle and King County:
* Emergency department (ED) visits for influenza like illness (ILI) have held steady for over three months, after declining from a peak in fall.
* One King County resident was hospitalized with laboratory-confirmed 2009 H1N1 influenza in week 11. This was the second laboratory-confirmed influenza hospitalization with onset after the week ending 2/6/10. All three laboratory-confirmed influenza hospitalizations with onset of illness in February were influenza B, while both laboratory-confirmed influenza hospitalizations with onset of illness in March have been 2009 H1N1.
* No laboratory-confirmed influenza deaths have occurred in King County residents since mid-February.
* The percentage of specimens testing positive for influenza from our outpatient surveillance system is below the average proportion observed at this time of year.
* The percentage of rapid antigen tests positive for influenza is below the average proportion observed this time of year.
* Thirteen long-term care facilities reported cases of influenza like illness in their facilities from mid-October through early January. No reports of influenza like illness in long-term care facilities have been received since early January.
* School absenteeism has been low and stable in recent weeks, with the majority of schools reporting <10% of students absent. Some schools were closed for all or part of the week ending 2/20/10. Average absenteeism increased for the week ending 2/20/10 for all schools but most markedly for high schools, a pattern seen during school breaks in the past.
http://www.kingcounty.gov/healthservices/health/communicable/immunization/fluactivity.aspx
 
Re: Washington--Week 13 - Two new deaths (total 98)

Re: Washington--Week 13 - Two new deaths (total 98)

Week 12:

One new death; total 96

Summary:
? Influenza activity in Washington is very low.
? From September 19, 2009?March 27, 2010, the Washington State Department of Health received reports of 1402 hospitalized and 80 deceased patients with laboratory-confirmed influenza. Four hospitalized patients with laboratory-confirmed influenza became ill in the past 4 weeks.
? During February 28?March 20 (weeks 9?11), 6 (1.1%) of the specimens tested by the World Health Organization/National Respiratory and Enteric Virus Surveillance System (WHO/NREVSS) collaborating laboratories in Washington were positive for influenza. Four of these specimens were 2009 influenza A (H1N1) viruses and two were influenza A viruses of unknown subtype.
? The proportion of outpatient visits for influenza-like illness (ILI) remains below the state baseline.

Four hospitalized patients with laboratory-confirmed influenza became ill in the past 4 weeks. Of these patients, 3 reside west and 1 resides east of the Cascade Mountains. (Western Washington and eastern Washington are defined as residing west or east of the Cascade Mountains.)

(PHRAID): Eight laboratories and clinics located in 6 counties in Washington regularly report the total number of influenza tests performed and the total number positive for influenza A and B each week through PHRAID. During CDC Week 12 (3/21?3/27), three facilities reported 0 (0%) influenza positive specimens out of 46 tests conducted.

Outpatient Influenza-like Illness Surveillance Network (ILINet) Data
During CDC Week 12, 6 sentinel providers in Washington reported data to CDC. Of 608 patient visits, 14 patients (2.3%) met the case definition for influenza-like illness

For week 12, emergency departments reported 65 ILI visits (0.98%) out of 6603 total patient visits.

During CDC Week 11, 25 (8.0%) of 311 deaths in Seattle, Spokane and Tacoma were due to pneumonia or influenza (P&I).
http://www.doh.wa.gov/EHSPHL/Epidemiology/CD/fluupdate.pdf

Seattle and King County
* Emergency department (ED) visits for influenza like illness (ILI) have held steady for over three months, after declining from a peak in fall.
* No King County residents were hospitalized with laboratory-confirmed influenza in week 12. There were three laboratory-confirmed influenza hospitalizations with onset of illness in February; all were influenza B. There have been two laboratory-confirmed influenza hospitalizations with onset of illness in March; both have been 2009 H1N1.
* No laboratory-confirmed influenza deaths have occurred in King County residents since mid-February.
* The percentage of specimens testing positive for influenza from our outpatient surveillance system is below the average proportion observed at this time of year.
* The percentage of rapid antigen tests positive for influenza is below the average proportion observed this time of year.
* Thirteen long-term care facilities reported cases of influenza like illness in their facilities from mid-October through early January. No reports of influenza like illness in long-term care facilities have been received since early January.
* School absenteeism has been low and stable in recent weeks, with the majority of schools reporting <10% of students absent.
http://www.kingcounty.gov/healthservices/health/communicable/immunization/fluactivity.aspx
 
Re: Washington--Week 13 - Two new deaths (total 98)

Re: Washington--Week 13 - Two new deaths (total 98)

Source: http://www.doh.wa.gov/h1n1/h1n1_newsroom.htm

Monitoring H1N1: Hospitalizations and deaths

On September 19, 2009, the state Department of Health began reporting hospitalizations and deaths for all types of influenza ? not only H1N1 (swine flu). From April 26, 2009 to September 18, 2009 there were 174 hospitalizations and 16 deaths attributed to H1N1 (swine flu).

Weekly updates will be posted on Thursday mornings and will include the total number of hospitalized and fatal cases of both H1N1 and seasonal flu in Washington.

Hospitalizations and deaths for all strains of influenza in Washington
Hospitalizations (9/19/2009 to 4/3/2010)
Deaths (9/19/2009 to 4/3/2010)

Western WA residents
965
62

Eastern WA residents
438
20

Total
1,403
82

Table updated 4/8/2010, 10:00 am
 
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