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Week 40:
? In Washington during weeks 37-40, influenza activity was very low and only rare, sporadic infections were detected.
? The proportion of outpatient and emergency room visits for influenza-like illness (ILI) was very low.
? No laboratory-confirmed influenza deaths were reported to the Washington State Department of Health (DOH) during week 40.
? During week 40 (10/2/11?10/8/11), 2 specimens tested by the World Health Organization/National Respiratory and Enteric Virus Surveillance System (WHO/NREVSS) collaborating laboratories in Washington were positive for influenza (1 influenza A (H2N2) and 1 influenza B). http://www.doh.wa.gov/notify/nc/influenza.htm
Week 41:
? In Washington during weeks 41, influenza activity was very low and only rare, sporadic infections were detected.
? During week 41 (10/9/11?10/15/11), 0 specimens tested by the World Health Organization/National Respiratory and Enteric Virus Surveillance System (WHO/NREVSS) collaborating laboratories in Washington were positive for influenza.
? The proportion of outpatient and emergency room visits for influenza-like illness (ILI) was very low.
? No laboratory-confirmed influenza deaths were reported to the Washington State Department of Health (DOH) during week 41. http://www.doh.wa.gov/notify/nc/influenza.htm
Re: Washington 2011-2012 Flu Season: Weeks 40-42 (No Activity)
Re: Washington 2011-2012 Flu Season: Weeks 40-42 (No Activity)
Week 42: No Activity
? During week 42 (10/16/11?10/22/11), 0 specimens of 154 tested by the World Health Organization/National Respiratory and Enteric Virus Surveillance System (WHO/NREVSS) collaborating laboratories in Washington were positive for influenza.
? The proportion of outpatient and emergency room visits for influenza-like illness (ILI) was very low: 0.5%
? No laboratory-confirmed influenza deaths have been reported to the Washington State Department of Health (DOH) this season.
P&I: 8.6%
To date for the 2011-12 influenza season, one influenza A (H3N2) isolate from Washington was sent to CDC for antigenic characterization by hemagglutination-inhibition testing. This specimen was found to be closely related antigenically to the influenza A (H3N2) component of the vaccine (A/Perth/16/2009-like). http://www.doh.wa.gov/notify/nc/influenza.htm
Re: Washington 2011-2012 Flu Season: Weeks 40-43 (No Activity)
Re: Washington 2011-2012 Flu Season: Weeks 40-43 (No Activity)
Week 43: "Almost" No Activity
? During week 43 (10/23/11?10/29/11), 1 (0.6%) specimen of 164 tested by the World Health Organization (WHO) Collaborating Laboratories in Washington was positive for influenza. The single positive test was influenza A (subtype not known).
? The proportion of outpatient and emergency room visits for influenza-like illness (ILI) was very low: 0.4%
? No laboratory-confirmed influenza deaths have been reported to the Washington State Department of Health (DOH) this season. http://www.doh.wa.gov/notify/nc/influenza.htm
Re: Washington 2011-2012 Flu Season: Weeks 40-45(Very Low)
Re: Washington 2011-2012 Flu Season: Weeks 40-45(Very Low)
Week 45:
ILI: 0.7%
? Influenza activity remained very low in Washington during week 45. Only rare sporadic infections were detected
? During week 45 (11/6/11?11/12/11), 0 specimens of 183 tested by the World Health Organization (WHO) Collaborating Laboratories in Washington were positive for influenza.
? No laboratory-confirmed influenza deaths have been reported to the Washington State Department of Health (DOH) this season. http://www.doh.wa.gov/notify/nc/influenza.htm
Week 50:
• Influenza activity remained low in Washington during week 50 (12/11/11–12/17/11).
• During week 50, 2 (8.3%) of 24 specimens tested by the World Health Organization Collaborating Laboratories in Washington were positive for influenza. Both positive specimens were influenza A (H3) viruses.
• An outbreak due to influenza A (H3) was reported from a facility in Pierce County during week 51.
• The proportion of outpatient and emergency room visits for influenza-like illness (ILI) remained low.
• No laboratory-confirmed deaths have been reported to the Washington State Department of Health this season.
• No novel influenza viruses have been detected in Washington this season. http://www.doh.wa.gov/notify/nc/influenza.htm
Week 51:
? Influenza activity remained low in Washington during week 51 (12/18/11?12/24/11).
? During week 51, 4 (2.6%) of 153 specimens tested by the World Health Organization Collaborating Laboratories in Washington were positive for influenza. Three positive specimens were influenza A (H3) viruses and one was influenza B.
? An outbreak due to influenza A (H3) was reported from a facility in Pierce County during week 51.
? The proportion of outpatient and emergency room visits for influenza-like illness (ILI) remained low.
? No laboratory-confirmed deaths have been reported to the Washington State Department of Health this season. http://www.doh.wa.gov/notify/nc/influenza.htm
Week 52:
4 total hospitalizations for season (majority A); 2 adult, 2 children
• Influenza activity remained low in Washington during week 52 (12/25/11–12/31/11).
• During week 52, 6 (4.3%) of 139 specimens tested by the World Health Organization Collaborating Laboratories in Washington were positive for influenza. All influenza A viruses subtyped this season have been influenza A (H3) viruses.
• The proportion of outpatient and emergency room visits for influenza-like illness (ILI) remained low.
• No novel influenza viruses have been detected in Washington this season. http://www.doh.wa.gov/notify/nc/influenza.htm
Re: Washington 2011-2012 Flu Season: Weeks 40-1 (One Death Reported)
Re: Washington 2011-2012 Flu Season: Weeks 40-1 (One Death Reported)
Week 1: 1 death reported in a 65+ year old
• There have been increased detections of positive influenza tests over the past two weeks but influenza activityhas remained low overall in Washington.
• During week 1, 7 (2.8%) of 250 specimens tested by the World Health Organization (WHO) Collaborating Laboratories in Washington were positive for influenza. During the past four weeks, 80% of positive specimenshave been influenza A viruses and 20% have been influenza B viruses. Almost all subtyped influenza A specimens were influenza A H3 viruses.
• The proportion of outpatient and emergency room visits for influenza-like illness (ILI) remained low, 0.5%. http://www.doh.wa.gov/notify/nc/influenza.htm
Re: Washington 2011-2012 Flu Season: Weeks 40-2 (No New Deaths; Total One)
Re: Washington 2011-2012 Flu Season: Weeks 40-2 (No New Deaths; Total One)
Week 2:
No new deaths; total 1
ILI: 0.8%
0.8% positive for influenza (A/2009H1N1, A/H3)
Since July 24, 2011, the Washington State Department of Health (DOH) has received one report of a laboratory-confirmed influenza death. This death was due to influenza B virus. http://www.doh.wa.gov/notify/nc/influenza.htm
Re: Washington 2011-2012 Flu Season: Weeks 40-3 (No New Death; Total One)
Re: Washington 2011-2012 Flu Season: Weeks 40-3 (No New Death; Total One)
Week 3:
No new deaths; total 1 (NOTE: Last week's report was confusing, but only one death has occurred according to this week's report)
5 hospitalizations have been reported for the season (2 adult; 3 children)
? Influenza activity remained low in Washington during week 3 (1/15/12?1/21/12).
? During week 3, 13 (5.2%) of 248 specimens tested by the World Health Organization (WHO) Collaborating Laboratories in Washington were positive for influenza. During the past four weeks, 79% of positive specimens have been influenza A viruses. Almost all subtyped influenza A specimens were influenza A H3 viruses.
? The proportion of outpatient and emergency room visits for influenza-like illness (ILI) remained low. http://www.doh.wa.gov/notify/nc/influenza.htm
Re: Washington 2011-2012 Flu Season: Weeks 40-5 (One New Death; Total Two)
Re: Washington 2011-2012 Flu Season: Weeks 40-5 (One New Death; Total Two)
Week 5: Sporadic 1 new death (occurring in week 4, age 5-24); total 2
• Influenza activity increased slightly in Washington during week 5 (1/29/12–2/4/12).
• During week 5, 12 (5.2%) of 233 specimens tested by the World Health Organization (WHO) Collaborating Laboratories in Washington were positive for influenza. During the past four weeks, 79% of positive specimens have been influenza A viruses. Almost all subtyped influenza A specimens were influenza A H3 viruses.
• The proportion of outpatient visits for influenza-like illness (ILI) increased to above baseline, while emergency room visits for influenza-like illness (ILI) remained low. http://www.doh.wa.gov/notify/nc/influenza.htm
Re: Washington 2011-2012 Flu Season: Weeks 40-6 (No New Deaths; Total Two)
Re: Washington 2011-2012 Flu Season: Weeks 40-6 (No New Deaths; Total Two)
Week 6:
No new deaths; total 2
? Influenza activity increased in Washington during week 6 (2/5/12?2/11/12) but remained fairly low overall.
ILI: 1.9%
5.4% positive for influenza http://www.doh.wa.gov/notify/nc/influenza.htm
Re: Washington 2011-2012 Flu Season: Weeks 40-7 (No New Deaths; Total Two)
Re: Washington 2011-2012 Flu Season: Weeks 40-7 (No New Deaths; Total Two)
Week 7:
No new deaths; total 2
Influenza activity continued to slowly increase in Washington during week 7 (2/12/12–2/18/12).
During week 7, 22 (7.3%) of 302 specimens tested by the World Health Organization (WHO) Collaborating Laboratories in Washington were positive for influenza. During the past four weeks, 81% of positive specimens have been influenza A viruses. Almost all subtyped influenza A specimens were influenza A H3 viruses.
Both the proportion of outpatient visits for influenza-like illness (ILI) and emergency room visits for influenza-like illness (ILI) remained below baseline. http://www.doh.wa.gov/notify/nc/influenza.htm
