Fluview 2012-13 Season: Weeks 41-38 (No New Pediatric Deaths; Total 164)

[Missouriwatcher]

During week 41 (October 7-13, 2012), influenza activity remained low in the United States.

Viral Surveillance: Of 3,285 specimens tested and reported by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories during week 41, 129 (3.9%) were positive for influenza.
Pneumonia and Influenza Mortality: The proportion of deaths attributed to pneumonia and influenza (P&I) was at the epidemic threshold.
Influenza-associated Pediatric Deaths: One influenza-associated pediatric death was reported and was associated with an influenza A virus for which the subtype was not determined.
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.1%, which is below the national baseline of 2.2%. 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 one state (Iowa) was reported as local; the District of Columbia and 32 states reported sporadic activity; Guam and 16 states reported no influenza activity, and Puerto Rico, the U.S. Virgin Islands, and one state did not report.

P&I deaths: 6.3%

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

[Missouriwatcher]

Re: Fluview 2012-13 Season: Weeks 41-42

During week 42 (October 14-20, 2012), influenza activity remained low in the United States.

Viral Surveillance: Of 2,891 specimens tested and reported by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories during week 42, 178 (6.2%) 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 1.2%, which is below the national baseline of 2.2%. 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 three states was reported as local; the District of Columbia and 34 states reported sporadic activity; Guam and 13 states reported no influenza activity, and Puerto Rico and the U.S. Virgin Islands did not report.

One influenza B virus tested, belonging to the B/Yamagata lineage of viruses, was characterized as B/Wisconsin/1/2010-like, the recommended influenza B component for the 2012-13 Northern Hemisphere influenza vaccine.

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

[Missouriwatcher]

Re: Fluview 2012-13 Season: Weeks 41-43

During week 43 (October 21-27, 2012), influenza activity remained low in the United States.

Viral Surveillance: Of 3,036 specimens tested and reported by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories during week 43, 188 (6.2&#37 were positive for influenza.
Pneumonia and Influenza Mortality: The proportion of deaths attributed to pneumonia and influenza (P&I) was above 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 1.1%, which is below the national baseline of 2.2%. All 10 regions reported ILI below region-specific baseline levels. One state experienced low ILI activity; 49 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 5 states was reported as local; the District of Columbia and 33 states reported sporadic activity; Guam and 12 states reported no influenza activity, and Puerto Rico and the U.S. Virgin Islands did not report.


CDC has antigenically characterized 9 influenza A (H3N2) viruses and 1 influenza B virus collected by U.S. laboratories since October 1, 2012.
Influenza A (H3N2):
All 9 influenza viruses tested were characterized as A/Victoria/361/2011-like, the influenza A (H3N2) component of the 2012-13 Northern Hemisphere influenza vaccine.

Influenza B (B/Yamagata/16/88 lineage):
Yamagata Lineage [1]: One influenza B virus tested, belonging to the B/Yamagata lineage of viruses, was characterized as B/Wisconsin/1/2010-like, the recommended influenza B component for the 2012-13 Northern Hemisphere influenza vaccine.

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

[Missouriwatcher]

Re: Fluview 2012-13 Season: Weeks 41-44

During week 44 (October 28-November 3, 2012), influenza activity increased in some areas, but overall was similar to activity last week in the United States.

Viral Surveillance: Of 3,277 specimens tested and reported by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories during week 44, 227 (6.9&#37 were positive for influenza.
Pneumonia and Influenza Mortality: The proportion of deaths attributed to pneumonia and influenza (6.6%) was slightly above 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 1.3%, which is below the national baseline of 2.2%. 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 1 state (Maine) was reported as regional; 8 states reported local activity; the District of Columbia and 32 states reported sporadic activity; Guam and 8 states reported no influenza activity, and Puerto Rico, the U.S. Virgin Islands, and 1 state did not report.

CDC has antigenically characterized 45 influenza viruses [1 2009 H1N1 virus, 9 influenza A (H3N2) viruses, and 35 influenza B virus collected by U.S. laboratories since October 1, 2012.
2009 H1N1:
The 2009 H1N1 virus tested was characterized as A/California/7/2009-like, the influenza A (H1N1) component of the 2012-13 influenza vaccine for the Northern Hemisphere.
Influenza A (H3N2):
All 9 influenza viruses tested were characterized as A/Victoria/361/2011-like, the influenza A (H3N2) component of the 2012-13 Northern Hemisphere influenza vaccine.
Influenza B (B/Yamagata/16/88 and B/Victoria/02/87 lineages) [35]:
Yamagata Lineage: Twenty four (68.6%) out of 35 B viruses were characterized as B/Wisconsin/1/2010-like, the influenza B component of the 2012-13 Northern Hemisphere influenza vaccine.
Victoria Lineage: Eleven (31.4%) of 35 B viruses tested belong to the B/Victoria lineage of viruses.

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

[Missouriwatcher]

Re: Fluview 2012-13 Season: Weeks 41-45

During week 45 (November 4-10, 2012), influenza activity increased in the United States.

Viral Surveillance: Of 4,147 specimens tested and reported by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories during week 45, 311 (7.5&#37 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 1.4%, which is below the national baseline of 2.2%. All 10 regions reported ILI below region-specific baseline levels. One state experienced moderate ILI activity, three states experienced low ILI activity; New York City and 46 states experienced minimal ILI activity, and the District of Columbia had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in 4 states (Alaska, Alabama, Maine, and Texas) was reported as regional; 8 states reported local activity; the District of Columbia and 32 states reported sporadic activity; Guam and 5 states reported no influenza activity, and Puerto Rico, the U.S. Virgin Islands, and 1 state did not report.

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

[Missouriwatcher]

Re: Fluview 2012-13 Season: Weeks 41-46

During week 46 (November 11-17, 2012), influenza activity increased in the U.S.

Viral Surveillance: Of 3,742 specimens tested and reported by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories during week 46, 494 (13.2&#37 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: One influenza-associated pediatric death was reported and was associated with an influenza A (H3) virus.
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.6%, which is below the national baseline of 2.2%. All 10 regions reported ILI below region-specific baseline levels. One state experienced high ILI activity (Mississippi), two states experienced moderate ILI activity; 3 states experienced low ILI activity; New York City and 41 states experienced minimal ILI activity, and the District of Columbia and 3 states had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in 1 state (Alaska) was reported as widespread; 6 states reported regional activity; 8 states reported local activity; the District of Columbia, Guam, and 31 states reported sporadic activity; 3 states reported no influenza activity, and Puerto Rico, the U.S. Virgin Islands and 1 state did not report.

Victoria Lineage: Fourteen (29.2%) of 48 influenza B viruses tested have been from the B/Victoria lineage of viruses

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

[Missouriwatcher]

Re: Fluview 2012-13 Season: Weeks 41-47

During week 47 (November 18-24, 2012), influenza activity increased in the U.S.

Viral Surveillance: Of 5,342 specimens tested and reported by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories during week 47, 812 (15.2%) were positive for influenza.
Novel Influenza A Virus: One human infection with a novel influenza A virus was reported.
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 2.2%, which is at the national baseline of 2.2%. Five regions (2,4,5,6,7) reported ILI above region-specific baseline levels. Five states experienced high ILI activity, two states experienced moderate ILI activity; 4 states experienced low ILI activity; New York City and 39 states experienced minimal ILI activity, and the District of Columbia had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in 4 states (Alaska, Mississippi, New York, and South Carolina) was reported as widespread; 7 states reported regional activity; 19 states reported local activity; the District of Columbia and 18 states reported sporadic activity; Guam and 1 state reported no influenza activity, and Puerto Rico, the U.S. Virgin Islands and 1 state did not report.

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

[Missouriwatcher]

Re: Fluview 2012-13 Season: Weeks 41-48 (Three Pediatric Deaths Reported)

During week 48 (November 25-December 1), influenza activity increased in the U.S.

Viral Surveillance: Of 5,511 specimens tested and reported by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories during week 48, 1,139 (20.7%) were positive for influenza.
Pneumonia and Influenza Mortality: The proportion of deaths attributed to pneumonia and influenza (6.5%) was below the epidemic threshold.
Influenza-associated Pediatric Deaths: Three influenza-associated pediatric deaths were reported. One of these deaths was associated with an influenza B virus and two were associated with influenza A viruses for which the subtype was not determined.
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.9%, which is below the national baseline of 2.2%. Three regions reported ILI above region-specific baseline levels. Four states experienced high ILI activity, three states experienced moderate ILI activity; 6 states experienced low ILI activity; New York City and 37 states experienced minimal ILI activity, and the District of Columbia had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in 8 states (Alabama, Alaska, Mississippi, New York, North Carolina, Ohio, Rhode Island, and South Carolina)was reported as widespread; 15 states reported regional activity; 15 states reported local activity; the District of Columbia, Guam, and 12 states reported sporadic activity, and Puerto Rico and the U.S. Virgin Islands did not report.

Antigenic Characterization:
CDC has antigenically characterized 249 influenza viruses [Ten 2009 H1N1 viruses, 155 influenza A (H3N2) viruses, and 84 influenza B viruses] collected by U.S. laboratories since October 1, 2012.

2009 H1N1:
All 10 2009 H1N1 viruses tested were characterized as A/California/7/2009-like, the influenza A (H1N1) component of the 2012-2013 influenza vaccine for the Northern Hemisphere.

Influenza A (H3N2):
153 (98.7%) of the 155 H3N2 influenza viruses tested have been characterized as A/Victoria/361/2011-like, the influenza A (H3N2) component of the 2012-2013 Northern Hemisphere influenza vaccine.
2 (1.3%) of the 155 H3N2 viruses tested showed reduced titers with antiserum produced against A/Victoria/361/2011.

Influenza B (B/Yamagata/16/88 and B/Victoria/02/87 lineages):
Yamagata Lineage: 57 (67.9%) of the 84 influenza B viruses tested so far this season have been characterized as B/Wisconsin/1/2010-like, the influenza B component of the 2012-2013 Northern Hemisphere influenza vaccine.

Victoria Lineage: 27 (32.1%) of 84 influenza B viruses tested have been from the B/Victoria lineage of viruses.

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

[Missouriwatcher]

Re: Fluview 2012-13 Season: Weeks 41-49 (One Pediatric Death Reported)

During week 49 (December 2-8), influenza activity increased in the U.S.

Viral Surveillance: Of 7,663 specimens tested and reported by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories during week 49, 2,172 (28.3%) were positive for influenza.
Novel Influenza A Virus: One human infection with a novel influenza A virus was reported.
Pneumonia and Influenza Mortality: The proportion of deaths attributed to pneumonia and influenza (P&I) was below the epidemic threshold.
Influenza-Associated Pediatric Deaths: 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 2.8%, which is above the national baseline of 2.2%. Seven of ten regions reported ILI above region-specific baseline levels. Eight states experienced high ILI activity, 2 states experienced moderate ILI activity; New York City and 9 states experienced low ILI activity; 31 states experienced minimal ILI activity, and the District of Columbia had insufficient data.
Geographic Spread of Influenza: The geographic spread of influenza in 18 states ((Alabama, Alaska, Arkansas, Connecticut, Florida, Kentucky, Iowa, Massachusetts, Mississippi, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Texas, Utah, and Wyoming) was reported as widespread; 17 states reported regional activity; the District of Columbia and 11 states reported local activity; Guam and 4 states reported sporadic activity, and Puerto Rico and the U.S. Virgin Islands did not report.

Victoria Lineage: 33.7% of 95 influenza B viruses tested have been from the B/Victoria lineage of viruses.

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

[Missouriwatcher]

Re: Fluview 2012-13 Season: Weeks 41-50 (Two Pediatric Deaths Reported)

During week 50 (December 9-15), influenza activity increased in the U.S.

Viral Surveillance: Of 9,562 specimens tested and reported by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories in week 50, 2,709 (28.3%) 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: Two influenza-associated pediatric deaths were reported. One was associated with an influenza A (H3) virus and one was associated with an influenza A virus for which the subtype was not determined.
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 3.2%; above the national baseline of 2.2%. Nine of ten regions reported ILI above region-specific baseline levels. Twelve states experienced high ILI activity, New York City and 5 states experienced moderate ILI activity; 11 states experienced low ILI activity; 22 states experienced minimal ILI activity, and the District of Columbia had insufficient data.
Geographic Spread of Influenza: Twenty-nine states reported widespread geographic influenza activity; 12 states reported regional activity; the District of Columbia and 5 states reported local activity; 3 states reported sporadic activity; Guam reported no influenza activity, and Puerto Rico, the U.S. Virgin Islands, and 1 state did not report.

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

[Missouriwatcher]

Re: Fluview 2012-13 Season: Weeks 41-51 (Eight Pediatric Deaths Reported; Total 16 )

During week 51 (December 16-22), influenza activity increased in the U.S.

Viral Surveillance: Of 6,234 specimens tested and reported by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories in week 51, 1,846 (29.6&#37 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: Eight influenza-associated pediatric deaths were reported. Three were associated with influenza B viruses, 3 were associated with influenza A (H3) viruses, and 2 were associated with influenza A viruses for which the subtype was not determined.
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 4.2%; above the national baseline of 2.2%. Nine of 10 regions reported ILI above region-specific baseline levels. New York City and 16 states experienced high ILI activity; 8 states experienced moderate ILI activity; 10 states experienced low ILI activity; 14 states experienced minimal ILI activity, and the District of Columbia and 2 states had insufficient data.
Geographic Spread of Influenza: Thirty-one states reported widespread geographic influenza activity; 14 states reported regional activity; the District of Columbia and 3 states reported local activity; 2 states reported sporadic activity; Guam reported no influenza activity, and Puerto Rico and the U.S. Virgin Islands did not report.

Victoria Lineage: (31.3%) of 115 influenza B viruses tested have been from the B/Victoria lineage of viruses.

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

[Missouriwatcher]

Re: Fluview 2012-13 Season: Weeks 41-52 (Two Pediatric Deaths Reported; Total 18 )

During week 52 (December 23-29), influenza activity increased in the U.S.

Viral Surveillance: Of 9,363 specimens tested and reported by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories, 2,961 (31.6%) 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: Two influenza-associated pediatric deaths were reported and were associated with influenza B viruses.
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 5.6%; above the national baseline of 2.2%. Nine of 10 regions reported ILI above region-specific baseline levels. New York City and 29 states experienced high ILI activity; 9 states experienced moderate ILI activity; 4 states experienced low ILI activity; 6 states experienced minimal ILI activity, and the District of Columbia and 2 states had insufficient data.
Geographic Spread of Influenza: Forty-one states reported widespread geographic influenza activity; 7 states reported regional activity; the District of Columbia reported local activity; 1 state reported sporadic activity; Guam reported no influenza activity, and Puerto Rico, the U.S. Virgin Islands, and 1 state did not report.

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

[Missouriwatcher]

Re: Fluview 2012-13 Season: Weeks 41-1 (Two Pediatric Deaths Reported; Total 20 )

During week 1 (December 30-January 5), influenza activity remained elevated in the U.S., but may be decreasing in some areas.

Viral Surveillance: Of 12,876 specimens tested and reported by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories, 4,222 (32.8&#37 were positive for influenza.

Pneumonia and Influenza Mortality: The proportion of deaths attributed to pneumonia and influenza (P&I) was slightly above the epidemic threshold.
Influenza-Associated Pediatric Deaths: Two influenza-associated pediatric deaths were reported. One was associated with an influenza A (H3) virus and one was associated with an influenza A virus for which the subtype was not determined.

Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 4.3%; above the national baseline of 2.2%. Nine of 10 regions reported ILI above region-specific baseline levels. Twenty-four states and New York City experienced high ILI activity; 16 states experienced moderate ILI activity; 5 states experienced low ILI activity; 5 states experienced minimal ILI activity, and the District of Columbia had insufficient data.

Geographic Spread of Influenza: Forty-seven states reported widespread geographic influenza activity; 2 states reported regional activity; the District of Columbia reported local activity; 1 state reported sporadic activity; Guam reported no influenza activity, and Puerto Rico and the U.S. Virgin Islands did not report.

Victoria Lineage [59]: 59 (33.3%) of 177 influenza B viruses tested have been from the B/Victoria lineage of viruses.

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

[Missouriwatcher]

Re: Fluview 2012-13 Season: Weeks 41-2 (Nine Pediatric Deaths Reported; Total 29)

During week 2 (January 6-12), influenza activity remained elevated in the United States, but decreased in some areas.

Viral Surveillance: Of 12,360 specimens tested and reported by collaborating laboratories, 3,638 (29.4&#37 were positive for influenza.
Pneumonia and Influenza Mortality: The proportion of deaths attributed to pneumonia and influenza (P&I) was above the epidemic threshold.
Influenza-Associated Pediatric Deaths: Nine influenza-associated pediatric deaths were reported. (Two were associated with influenza A (H3) viruses and occurred during weeks 1 and 2, four were associated with influenza A viruses for which the subtype was not determined and occurred during weeks 1 and 2, and three were associated with influenza B viruses and occurred during weeks 48, 50, and 2)
Influenza-Associated Hospitalizations: A cumulative rate for the season of 18.8 laboratory-confirmed influenza-associated hospitalizations per 100,000 population was reported. Among all cases, 49.6% were in adults 65 years and older.
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 4.6%; this is above the national baseline of 2.2%. All 10 regions reported ILI above region-specific baseline levels. Thirty states and New York City experienced high ILI activity; 10 states experienced moderate activity; 7 states experienced low activity; 3 states experienced minimal activity, and the District of Columbia had insufficient data.
Geographic Spread of Influenza: Forty-eight states reported widespread geographic influenza activity; 2 states reported regional activity; the District of Columbia reported local activity; Guam reported no influenza activity, and Puerto Rico and the U.S. Virgin Islands did not report.

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

[Missouriwatcher]

Re: Fluview 2012-13 Season: Weeks 41-3 (Eight Pediatric Deaths; Total 37)

During week 3 (January 13-19), influenza activity remained elevated in the United States, but decreased in some areas.

Viral Surveillance: Of 11,984 specimens tested and reported by collaborating laboratories, 3,129 (26.1%) were positive for influenza.
Pneumonia and Influenza Mortality: The proportion of deaths attributed to pneumonia and influenza (9.8%) was above the epidemic threshold.
Influenza-Associated Pediatric Deaths: Eight influenza-associated pediatric deaths were reported. Two were associated with influenza A viruses for which the subtype was not determined and occurred during week 1 (week ending January 5, 2013), and six were associated with influenza B viruses and occurred during weeks 43, 46, 50, 52, and 3 (weeks ending October 27, November 17, December 15 and 29, 2012 and January 19, 2013).
Influenza-Associated Hospitalizations: A cumulative rate for the season of 22.2 laboratory-confirmed influenza-associated hospitalizations per 100,000 population was reported. Of all hospitalizations, 50% were among adults 65 years and older.
Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 4.3%; this is above the national baseline of 2.2%. All 10 regions reported ILI above region-specific baseline levels. Twenty-six states and New York City experienced high ILI activity; 14 states experienced moderate activity; 9 states experienced low activity; 1 state experienced minimal activity, and the District of Columbia had insufficient data.
Geographic Spread of Influenza: Forty-seven states reported widespread geographic influenza activity; 2 states reported regional activity; the District of Columbia and one state reported local activity; Guam reported sporadic influenza activity, and Puerto Rico and the U.S. Virgin Islands did not report.

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