Fluview 2011-2012 Flu Season: Weeks 40-39 (No Pediatric Deaths; Total 34)

[Missouriwatcher]

During week 40 (October 2-8, 2011), influenza activity was low in the United States.

Viral Surveillance: Of the 1,343 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 16 (1.2%) were positive for influenza.
Pneumonia and Influenza Mortality: The proportion of deaths attributed to pneumonia and influenza (P&I) was below the epidemic threshold.
Influenza-associated Pediatric Deaths: No influenza-associated pediatric deaths were reported
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.0%, which is below the national baseline of 2.4%. All 10 regions reported ILI below region-specific baseline levels. Forty-eight states and New York City experienced minimal ILI activity and the District of Columbia and two states had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in the District of Columbia, Puerto Rico, the U.S. Virgin Islands, and 20 states was reported as sporadic; Guam and 29 states reported no influenza activity, and one state did not report.
http://www.cdc.gov/flu/weekly/

 

[Missouriwatcher]

Re: Fluview 2011-2012 Flu Season: Weeks 40-41

Re: Fluview 2011-2012 Flu Season: Weeks 40-41

During week 41 (October 9-15, 2011), influenza activity remained low in the United States.

Viral Surveillance: Of the 1,286 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 6 (0.5%) were positive for influenza.
Novel influenza A Virus: One human infection with a novel influenza A virus was reported.
Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I was below the epidemic threshold.
Influenza-associated Pediatric Mortality: No influenza-associated pediatric deaths were reported
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.0%, which is below the national baseline of 2.4%. All 10 regions reported ILI below region-specific baseline levels. Forty-nine states and New York City experienced minimal ILI activity and the District of Columbia and one state had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in the District of Columbia, Guam, Puerto Rico, the U.S. Virgin Islands, and 18 states was reported as sporadic and 32 states reported no influenza activity.

One case of human infection with a novel influenza A virus was reported by the Maine Center for Disease Control and Prevention. The patient was infected with a swine origin influenza A (H3N2) virus. Testing performed at Maine’s Health and Environmental Testing Laboratory on October 14, 2011 indicated a likely swine origin influenza A (H3N2) virus and this result was confirmed at CDC on October 16, 2011. The patient reported attendance at an event where pigs were present in the week preceding symptom onset on October 7, 2011, did not require hospitalization, and continues to recover. No illness has been identified in family members or close contacts, but the investigation is ongoing.
http://www.cdc.gov/flu/weekly/

 

[Missouriwatcher]

Re: Fluview 2011-2012 Flu Season: Weeks 40-42

Re: Fluview 2011-2012 Flu Season: Weeks 40-42

During week 42 (October 16-22, 2011), influenza activity remained low in the United States.

Viral Surveillance: Of the 1,479 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 12 (0.8%) were positive for influenza.
Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I was below the epidemic threshold.
Influenza-associated Pediatric Mortality: No influenza-associated pediatric deaths were reported
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.1%, which is below the national baseline of 2.4%. All 10 regions reported ILI below region-specific baseline levels. All 50 states and New York City experienced minimal ILI activity and the District of Columbia had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in the District of Columbia, Puerto Rico, the U.S. Virgin Islands, and 18 states was reported as sporadic and Guam and 32 states reported no influenza activity.

CDC has antigenically characterized four influenza viruses [four influenza A (H3N2) viruses] collected by U.S. laboratories since October 1, 2011.
Influenza A (H3N2)
All four were characterized as A/Perth/16/2009-like, the influenza A (H3N2) component of the 2011-12 influenza vaccine for the Northern Hemisphere.

http://www.cdc.gov/flu/weekly/

 

[Missouriwatcher]

Re: Fluview 2011-2012 Flu Season: Weeks 40-43

Re: Fluview 2011-2012 Flu Season: Weeks 40-43

During week 43 (October 23-29, 2011), influenza activity remained low in the United States.

U.S. Virologic Surveillance: Of the 1,804 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 17 (0.9%) were positive for influenza.
Novel influenza A Virus: Two human infections with a novel influenza A virus were identified.
Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I was below the epidemic threshold.
Influenza-associated Pediatric Mortality: No influenza-associated pediatric deaths were reported
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.2%, which is below the national baseline of 2.4%. All 10 regions reported ILI below region-specific baseline levels. Forty-nine states and New York City experienced minimal ILI activity, one state experienced ILI low activity and the District of Columbia had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in the District of Columbia, Puerto Rico, and 19 states was reported as sporadic and Guam, the U.S. Virgin Islands, and 31 states reported no influenza activity.


Two human infections with novel influenza A viruses were detected in individuals from two states (Indiana and Maine). Both patients were infected with swine-origin influenza A (H3N2) viruses. One patient was hospitalized, but has now been discharged and both continue to recover from their illnesses. Both patients reported close contacts with pigs preceding their illness onset. There is no evidence of an epidemiological link between these two patients and no sustained human-to-human transmission of these viruses has been found in either state. Additional information on these cases is available at http://www.cdc.gov/media/haveyouheard/stories/H3N2_virus2.html

Antigenic Characterization:
CDC has antigenically characterized five influenza viruses [four influenza A (H3N2) viruses and one influenza B virus] collected by U.S. laboratories since October 1, 2011.

Influenza A (H3N2)
All four were characterized as A/Perth/16/2009-like, the influenza A (H3N2) component of the 2011-12 influenza vaccine for the Northern Hemisphere.

Influenza B
The virus tested belongs to the B/Victoria lineage and was characterized as B/Brisbane/60/2008-like, the influenza B component of the 2011-12 influenza vaccine for the Northern Hemisphere.
http://www.cdc.gov/flu/weekly/

 

[Missouriwatcher]

Re: Fluview 2011-2012 Flu Season: Weeks 40-44

Re: Fluview 2011-2012 Flu Season: Weeks 40-44

During week 44 (October 30- November 5, 2011), influenza activity remained low in the United States.

U.S. Virologic Surveillance: Of the 1,833 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 11 (0.6%) were positive for influenza.
Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I was below the epidemic threshold.
Influenza-associated Pediatric Mortality: No influenza-associated pediatric deaths were reported
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.3%, which is below the national baseline of 2.4%. All 10 regions reported ILI below region-specific baseline levels. Forty-nine states and New York City experienced minimal ILI activity, one state experienced ILI low activity and the District of Columbia had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in one state was reported as local; the District of Columbia, Puerto Rico, and 25 states reported sporadic activity, and Guam, the U.S. Virgin Islands, and 24 states reported no influenza activity.

Antigenic Characterization:
CDC has antigenically characterized 12 influenza viruses [11 influenza A (H3N2) viruses and one influenza B virus] collected by U.S. laboratories since October 1, 2011.

Influenza A (H3N2)
All 11 were characterized as A/Perth/16/2009-like, the influenza A (H3N2) component of the 2011-12 influenza vaccine for the Northern Hemisphere.

Influenza B:
The virus tested belongs to the B/Victoria lineage and was characterized as B/Brisbane/60/2008-like, the influenza B component of the 2011-12 influenza vaccine for the Northern Hemisphere.
http://www.cdc.gov/flu/weekly/?source=govdelivery

 

[JimO]

Re: Fluview 2011-2012 Flu Season: Weeks 40-44

Re: Fluview 2011-2012 Flu Season: Weeks 40-44

Influenza A (H3N2)
All 11 were characterized as A/Perth/16/2009-like, the influenza A (H3N2) component of the 2011-12 influenza vaccine for the Northern Hemisphere.

Influenza B:
The virus tested belongs to the B/Victoria lineage and was characterized as B/Brisbane/60/2008-like, the influenza B component of the 2011-12 influenza vaccine for the Northern Hemisphere.
http://www.cdc.gov/flu/weekly/?source=govdelivery

There is no mention of the most recent cases of trH3N2 in Maine and Indiana, which is curious. Table 1 of reportable diseases and conditions lists the Maine case.

 

[Missouriwatcher]

Re: Fluview 2011-2012 Flu Season: Weeks 40-45

Re: Fluview 2011-2012 Flu Season: Weeks 40-45

During week 45 (November 6-12, 2011), influenza activity remained low in the United States.
U.S. Virologic Surveillance: Of the 2,145 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 30 (1.4%) were positive for influenza.
Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I was below the epidemic threshold.
Influenza-associated Pediatric Mortality: No influenza-associated pediatric deaths were reported
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.2%, which is below the national baseline of 2.4%. All 10 regions reported ILI below region-specific baseline levels. Forty-nine states and New York City experienced minimal ILI activity, one state experienced low ILI activity and the District of Columbia had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in the District of Columbia, Guam, and 23 states was reported as sporadic; the U.S. Virgin Islands and 27 states reported no influenza activity, and Puerto Rico did not report.
http://www.cdc.gov/flu/weekly/

 

[Missouriwatcher]

Re: Fluview 2011-2012 Flu Season: Weeks 40-47

Re: Fluview 2011-2012 Flu Season: Weeks 40-47

During week 47 (November 20-26, 2011), influenza activity remained low in the United States.

U.S. Virologic Surveillance: Of the 2,130 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 40 (1.9%) were positive for influenza..
Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I was below the epidemic threshold.
Influenza-associated Pediatric Mortality: Two influenza-associated pediatric deaths were reported. These deaths occurred during the 2010-11 influenza season.
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.4%, which is below the national baseline of 2.4%. All 10 regions reported ILI below region-specific baseline levels. All 50 states and New York City experienced minimal ILI activity and the District of Columbia had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in one state was reported as local; the District of Columbia, Guam, and 29 states reported sporadic activity; the U.S. Virgin Islands and 21 states reported no influenza activity, and Puerto Rico did not report.
http://www.cdc.gov/flu/weekly/

 

[Missouriwatcher]

Re: Fluview 2011-2012 Flu Season: Weeks 40-48

Re: Fluview 2011-2012 Flu Season: Weeks 40-48

Week 48:
U.S. Virologic Surveillance: Of the 2,233 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 37 (1.7%) were positive for influenza.
Novel influenza A Virus: Two human infections with a novel influenza A virus were identified.
Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I was below the epidemic threshold.
Influenza-associated Pediatric Mortality: Two influenza-associated pediatric deaths were reported. These deaths occurred during the 2010-11 influenza season.
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.2%, which is below the national baseline of 2.4%. All 10 regions reported ILI below region-specific baseline levels. Two states and New York City experienced low ILI activity, forty-eight states experienced minimal ILI activity, and the District of Columbia had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in one state was reported as local; the District of Columbia, Guam, Puerto Rico, and 30 states reported sporadic activity, and the U.S. Virgin Islands and 19 states reported no influenza activity.

Novel Influenza A Viruses:
Two human infections with novel influenza A viruses were detected in children from two states (Minnesota and West Virginia). One patient was infected with a novel influenza A (H1N2) virus and one patient was infected with a novel influenza A (H3N2) virus. Both patients have recovered from their illnesses. While both viruses are known to circulate in U.S. swine, there was no close contact with pigs reported preceding illness onset in either case. Both states have been investigating case contacts and sources of exposure, however, no additional confirmed cases have been detected at this time.
http://www.cdc.gov/flu/weekly/

 

[Missouriwatcher]

Re: Fluview 2011-2012 Flu Season: Weeks 40-49

Re: Fluview 2011-2012 Flu Season: Weeks 40-49

During week 49 (December 4-10, 2011), influenza activity remained low in the United States.

U.S. Virologic Surveillance: Of the 2,480 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 48 (1.9%) were positive for influenza.
Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I (6.5%) was below the epidemic threshold.
Influenza-associated Pediatric Mortality: No influenza-associated pediatric deaths were reported.
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.2%, which is below the national baseline of 2.4%. All 10 regions reported ILI below region-specific baseline levels. Two states and New York City experienced low ILI activity, forty-eight states experienced minimal ILI activity, and the District of Columbia had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in three states was reported as local (Alabama, Colorado, and Virginia); Guam, Puerto Rico, and 32 states reported sporadic activity, and the District of Columbia, the U.S. Virgin Islands, and 15 states reported no influenza activity.

It is too early in the influenza season to determine how well the seasonal influenza vaccine strains and circulating strains will match.
http://www.cdc.gov/flu/weekly/

 

[Missouriwatcher]

Re: Fluview 2011-2012 Flu Season: Weeks 40-50

Re: Fluview 2011-2012 Flu Season: Weeks 40-50

During week 50 (December 11-17, 2011), influenza activity remained low in the United States.

U.S. Virologic Surveillance: Of the 2,993 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 64 (2.1%) were positive for influenza.
Novel influenza A Virus: Two human infections with a novel influenza A virus were reported.
Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I was below the epidemic threshold.
Influenza-associated Pediatric Mortality: No influenza-associated pediatric deaths were reported.
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.4%, which is below the national baseline of 2.4%. All 10 regions reported ILI below region-specific baseline levels. One state experienced moderate ILI activity, New York City experienced low ILI activity, 49 states experienced minimal ILI activity, and the District of Columbia had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in two states was reported as local; Guam, Puerto Rico, and 37 states reported sporadic activity, and the District of Columbia, the U.S. Virgin Islands, and 11 states reported no influenza activity.

Two human infections with novel influenza A viruses were detected in two states (West Virginia and Wisconsin). One patient was infected with an influenza A (H1N1) variant virus with genes from human, swine, and avian lineages (A(H1N1)v) and reported close contact with pigs prior to illness onset. The other patient was infected with an influenza A (H3N2) variant virus with genes from human, swine, and avian lineages (A(H3N2)v) and did not have contact with pigs prior to illness onset, but did have contact with another confirmed case of A(H3N2)v. Both patients have recovered from their illnesses...

CDC is required to report all cases of human infection with novel influenza viruses to the World Health Organization (WHO) as part of the International Health Regulations (IHR)
http://www.cdc.gov/flu/weekly/

 

[Missouriwatcher]

Re: Fluview 2011-2012 Flu Season: Weeks 40-51

Re: Fluview 2011-2012 Flu Season: Weeks 40-51

During week 51 (December 18-24, 2011), influenza activity remained low in the United States.

U.S. Virologic Surveillance: Of the 2,652 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 97 (3.7%) were positive for influenza.
Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I (7.2%) was below the epidemic threshold.
Influenza-associated Pediatric Mortality: No influenza-associated pediatric deaths were reported.
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.5%, which is below the national baseline of 2.4%. All 10 regions reported ILI below region-specific baseline levels. One state experienced moderate ILI activity, New York City and one state experienced low ILI activity, 47 states experienced minimal ILI activity, and the District of Columbia and one state had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in Colorado was reported as regional; two states reported local activity; Guam and 37 states reported sporadic activity; the District of Columbia, the U.S. Virgin Islands and 10 states reported no influenza activity, and Puerto Rico did not report.
http://www.cdc.gov/flu/weekly/

 

[Missouriwatcher]

Re: Fluview 2011-2012 Flu Season: Weeks 40-52

Re: Fluview 2011-2012 Flu Season: Weeks 40-52

During week 52 (December 25-31, 2011), influenza activity increased in the United States, but remains relatively low.

U.S. Virologic Surveillance: Of the 3,310 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 95 (2.9%) were positive for influenza.
Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I was below the epidemic threshold.
Influenza-associated Pediatric Mortality: No influenza-associated pediatric deaths were reported.
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.7%, which is below the national baseline of 2.4%. Three of the 10 regions (Regions 1, 5, and 10) reported ILI at or above region-specific baseline levels. One state experienced moderate ILI activity, New York City and six states experienced low ILI activity, 42 states experienced minimal ILI activity, and the District of Columbia and one state had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in Colorado was reported as regional; four states reported local activity; Guam and 40 states reported sporadic activity; the District of Columbia, the U.S. Virgin Islands and five states reported no influenza activity, and Puerto Rico did not report.
http://www.cdc.gov/flu/weekly/

 

[Missouriwatcher]

Re: Fluview 2011-2012 Flu Season: Weeks 40-1

Re: Fluview 2011-2012 Flu Season: Weeks 40-1

Week 1:

U.S. Virologic Surveillance: Of the 3,199 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 108 (3.4%) were positive for influenza.
Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I was below the epidemic threshold.
Influenza-associated Pediatric Mortality: No influenza-associated pediatric deaths were reported.
Outpatient Illness Surveillance:The proportion of outpatient visits for influenza-like illness (ILI) was 1.4%, which is below the national baseline of 2.4%. All 10 regions reported ILI below region-specific baseline levels. Two states experienced low ILI activity, New York City and 48 states experienced minimal ILI activity, and the District of Columbia had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in two states (CO and NH) was reported as regional; seven states reported local activity; 37 states reported sporadic activity; the District of Columbia, Guam, the U.S. Virgin Islands and four states reported no influenza activity, and Puerto Rico did not report.
http://www.cdc.gov/flu/weekly/

 

[Missouriwatcher]

Re: Fluview 2011-2012 Flu Season: Weeks 40-2

Re: Fluview 2011-2012 Flu Season: Weeks 40-2

Week 2:
During week 2 (January 8-14, 2012), influenza activity in the United States remained relatively low.

U.S. Virologic Surveillance: Of the 3,771 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 138 (3.7%) were positive for influenza.
Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I was below the epidemic threshold.
Influenza-associated Pediatric Mortality: No influenza-associated pediatric deaths were reported.
Outpatient Illness Surveillance:The proportion of outpatient visits for influenza-like illness (ILI) was 1.2%, which is below the national baseline of 2.4%. All 10 regions reported ILI below region-specific baseline levels. New York City and all 50 states experienced minimal ILI activity and the District of Columbia had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in one state was reported as regional; eight states reported local activity; Puerto Rico and 38 states reported sporadic activity, and the District of Columbia, Guam, the U.S. Virgin Islands, and three states reported no influenza activity.
http://www.cdc.gov/flu/weekly/

 

[Missouriwatcher]

Re: Fluview 2011-2012 Flu Season: Weeks 40-3

Re: Fluview 2011-2012 Flu Season: Weeks 40-3

Week 3:
During week 3 (January 15-21, 2012), influenza activity in the United States remained relatively low.

U.S. Virologic Surveillance: Of the 3,572 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 175 (4.9%) were positive for influenza.
Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I was 7.8%, slightly above the epidemic threshold.
Influenza-associated Pediatric Mortality: One influenza-associated pediatric death was reported and was associated with an influenza B virus infection. (Occurring in week 43)
Outpatient Illness Surveillance:The proportion of outpatient visits for influenza-like illness (ILI) was 1.4%, which is below the national baseline of 2.4%. All 10 regions reported ILI below region-specific baseline levels. New York City and all 50 states experienced minimal ILI activity and the District of Columbia had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in four states (Colorado, Kentucky, Missouri, and Virginia) was reported as regional; eight states reported local activity; Guam and 35 states reported sporadic activity; the U.S. Virgin Islands and three states reported no influenza activity, and the District of Columbia and Puerto Rico did not report.

Between October 1, 2011 and January 21, 2012, 166 laboratory-confirmed influenza hospitalizations were reported, a rate of 0.6 per 100,000 population. Among cases, 120 (72.3%) were influenza A, 38 (22.9%) were influenza B, and 2 (1.2%) were influenza A and B co-infections; 6 (3.6%) had no virus type information. Among those with influenza A subtype information, 48 were H3N2 and 4 were 2009 H1N1. The most commonly reported underlying medical conditions among adults were chronic lung diseases, asthma and obesity. The most common underlying medical conditions in children were neurologic disorders and obesity. However, more than a third of hospitalized children had no identified underlying medical conditions.
http://www.cdc.gov/flu/weekly/

 

[Missouriwatcher]

Re: Fluview 2011-2012 Flu Season: Weeks 40-4

Re: Fluview 2011-2012 Flu Season: Weeks 40-4

During week 4 (January 22-28, 2012), influenza activity in the United States increased slightly, but remained relatively low.

U.S. Virologic Surveillance: Of the 3,656 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 262 (7.2%) were positive for influenza.
Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I was below the epidemic threshold.
Influenza-associated Pediatric Mortality: No influenza-associated pediatric deaths were reported.
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.5%, which is below the national baseline of 2.4%. All 10 regions reported ILI below region-specific baseline levels. One state experienced low ILI activity, New York City and 49 states experienced minimal ILI activity and the District of Columbia had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in six states was reported as regional (California, Colorado, Kentucky, Missouri, New Hampshire, and Virginia); 13 states reported local activity; Guam, Puerto Rico, and 31 states reported sporadic activity; the U.S. Virgin Islands reported no influenza activity, and the District of Columbia did not report.
http://www.cdc.gov/flu/weekly/

 

[Missouriwatcher]

Re: Fluview 2011-2012 Flu Season: Weeks 40-5 (One Pediatric Death; Total Two)

Re: Fluview 2011-2012 Flu Season: Weeks 40-5 (One Pediatric Death; Total Two)

During week 5 (January 29-February 4, 2012), influenza activity in the United States increased.

U.S. Virologic Surveillance: Of the 3,586 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 378 (10.5%) were positive for influenza.
Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I was below the epidemic threshold.
Influenza-associated Pediatric Mortality: One influenza-associated pediatric death was reported and was associated with influenza A virus for which the subtype was not determined.
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.7%, which is below the national baseline of 2.4%. Regions 7 and 10 reported ILI above region-specific baseline levels. One state experienced moderate ILI activity, 5 states experienced low ILI activity, New York City and 44 states experienced minimal ILI activity, and the District of Columbia had insufficient data.
Geographic Spread of Influenza: One state (California) reported widespread geographic activity; 9 states (Alabama, Colorado, Illinois, Iowa, Missouri, Nevada, Texas, Utah, and Virginia) reported regional activity; 12 states reported local activity; the District of Columbia, Puerto Rico, and 27 states reported sporadic activity; Guam, the U.S. Virgin Islands and 1 state reported no influenza activity.

Only a small number of influenza B viruses from the United States have been available for testing so far this season. While less than 50% of these viruses are similar to the influenza B component in the 2011-2012 influenza vaccine, the majority of influenza B viruses circulating worldwide have been similar to the influenza vaccine strain.
http://www.cdc.gov/flu/weekly/

 

[Missouriwatcher]

Re: Fluview 2011-2012 Flu Season: Weeks 40-6 (One Pediatric Death; Total Three)

Re: Fluview 2011-2012 Flu Season: Weeks 40-6 (One Pediatric Death; Total Three)

Week 6:
U.S. Virologic Surveillance: Of the 3,230 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 500 (15.5%) were positive for influenza.
Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I was below the epidemic threshold.
Influenza-associated Pediatric Mortality: One influenza-associated pediatric death was reported and was associated with an influenza B virus.
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.9%, which is below the national baseline of 2.4%. Region 7 reported ILI above its region-specific baseline. One state experienced high ILI activity, 6 states experienced low ILI activity, New York City and 43 states experienced minimal ILI activity, and the District of Columbia had insufficient data.
Geographic Spread of Influenza: One state reported widespread geographic activity; 12 states reported regional influenza activity; 17 states reported local activity; the District of Columbia, Guam, and 20 states reported sporadic activity; the U.S. Virgin Islands reported no influenza activity, and Puerto Rico did not report.
http://www.cdc.gov/flu/weekly/

 

[Missouriwatcher]

Re: Fluview 2011-2012 Flu Season: Weeks 40-7 (N0 Pediatric Deaths; Total Three)

Re: Fluview 2011-2012 Flu Season: Weeks 40-7 (N0 Pediatric Deaths; Total Three)

During week 7 (February 12-18, 2012), influenza activity in the United States increased slightly, but remained relatively low.

U.S. Virologic Surveillance: Of the 4,269 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 614 (14.4%) were positive for influenza.
Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I was below the epidemic threshold.
Influenza-associated Pediatric Mortality: No influenza-associated pediatric deaths were reported.
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.9%, which is below the national baseline of 2.4%. Regions 5 and 7 reported ILI at or above region-specific baseline levels. One state experienced high ILI activity; 2 states experienced moderate ILI activity; 6 states experienced low ILI activity; New York City and 41 states experienced minimal ILI activity, and the District of Columbia had insufficient data
Geographic Spread of Influenza: Two states reported widespread geographic activity; 13 states reported regional influenza activity; 20 states reported local activity; the District of Columbia, Puerto Rico, and 15 states reported sporadic activity, and Guam and the U.S. Virgin Islands reported no influenza activity.
http://www.cdc.gov/flu/weekly/