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

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  • #16
    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.
    Learn more about the weekly influenza surveillance report (FluView) prepared by the Influenza Division.

    Comment


    • #17
      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.
      Learn more about the weekly influenza surveillance report (FluView) prepared by the Influenza Division.

      Comment


      • #18
        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.
        Learn more about the weekly influenza surveillance report (FluView) prepared by the Influenza Division.

        Comment


        • #19
          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.
          Learn more about the weekly influenza surveillance report (FluView) prepared by the Influenza Division.

          Comment


          • #20
            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.
            Learn more about the weekly influenza surveillance report (FluView) prepared by the Influenza Division.

            Comment


            • #21
              Re: Fluview 2011-2012 Flu Season: Weeks 40-8 (One Pediatric Death; Total Four)

              1 influenza-associated pediatric death; total 4

              During week 8 (February 19-25, 2012), influenza activity in the United States increased slightly, but remained relatively low.

              U.S. Virologic Surveillance: Of the 3,947 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, 726 (18.4%) 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: One influenza-associated pediatric death was reported and was associated with an influenza virus for which the type 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 2.4%. Regions 1, 5, and 7 reported ILI at or above region-specific baseline levels. Three states experienced high ILI activity; 2 states experienced moderate ILI activity; 6 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: Six states reported widespread geographic activity; 18 states reported regional influenza activity; 13 states reported local activity; the District of Columbia, Guam, Puerto Rico, and 12 states reported sporadic activity; the U.S. Virgin Islands reported no influenza activity, and one state did not report.
              Learn more about the weekly influenza surveillance report (FluView) prepared by the Influenza Division.


              NOTE: P&I: 7.6% see http://www.cdc.gov/mmwr/preview/mmwr...cid=mm6108md_w

              Comment


              • #22
                Re: Fluview 2011-2012 Flu Season: Weeks 40-9 (One Pediatric Death; Total Five)

                Week 9:
                1 influenza-associated pediatric death; total 5

                During week 9 (February 26 ? March 3, 2012), influenza activity is elevated in some areas in the United States, but influenza-like-illness remains relatively low nationally.

                U.S. Virologic Surveillance: Of the 4,776 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, 1,019 (21.3%) 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 a seasonal influenza A (H3) virus.
                Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 2.0%, which is below the national baseline of 2.4%. Regions 5 and 7 reported ILI above region-specific baseline levels. Three states experienced high ILI activity; 3 states experienced moderate ILI activity; 7 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: Nine states reported widespread geographic activity; 21 states reported regional influenza activity; 12 states reported local activity; the District of Columbia, Guam, Puerto Rico, and 8 states reported sporadic activity, and the U.S. Virgin Islands reported no influenza activity.
                Learn more about the weekly influenza surveillance report (FluView) prepared by the Influenza Division.

                Comment


                • #23
                  Re: Fluview 2011-2012 Flu Season: Weeks 40-9 (One Pediatric Death; Total Five)

                  Is it unusual that there were no additional antigenic characterizations for H3N2 during Week 9 from Week 8? Typo perhaps?

                  Week 8:

                  ?Three hundred nineteen (78.4%) of the 407 viruses were characterized as A/Perth/16/2009-like, the influenza A (H3N2) component of the 2011-2012 influenza vaccine for the Northern Hemisphere.
                  ?Eighty-eight viruses (21.6%) tested showed reduced titers with antiserum produced against A/Perth/16/2009.

                  Week 9:

                  ?Three hundred nineteen (78.4%) of the 407 viruses were characterized as A/Perth/16/2009-like, the influenza A (H3N2) component of the 2011-2012 influenza vaccine for the Northern Hemisphere.
                  ?Eighty-eight viruses (21.6%) tested showed reduced titers with antiserum produced against A/Perth/16/2009.

                  Comment


                  • #24
                    Re: Fluview 2011-2012 Flu Season: Weeks 40-9 (One Pediatric Death; Total Five)

                    Originally posted by curiosity View Post
                    Is it unusual that there were no additional antigenic characterizations for H3N2 during Week 9 from Week 8? Typo perhaps?

                    Week 8:

                    ?Three hundred nineteen (78.4%) of the 407 viruses were characterized as A/Perth/16/2009-like, the influenza A (H3N2) component of the 2011-2012 influenza vaccine for the Northern Hemisphere.
                    ?Eighty-eight viruses (21.6%) tested showed reduced titers with antiserum produced against A/Perth/16/2009.

                    Week 9:

                    ?Three hundred nineteen (78.4%) of the 407 viruses were characterized as A/Perth/16/2009-like, the influenza A (H3N2) component of the 2011-2012 influenza vaccine for the Northern Hemisphere.
                    ?Eighty-eight viruses (21.6%) tested showed reduced titers with antiserum produced against A/Perth/16/2009.
                    Seems like a typo is possible...?

                    Comment


                    • #25
                      Re: Fluview 2011-2012 Flu Season: Weeks 40-10 (No Pediatric Deaths; Total Five)

                      Week 10:
                      No new pediatric deaths; total 5

                      During week 10 (March 4-10, 2012), influenza activity remained elevated in some areas of the United States, but influenza-like-illness continued to be relatively low nationally.

                      U.S. Virologic Surveillance: Of the 4,742 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, 1,099 (23.2%) 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 2.2%, which is below the national baseline of 2.4%. Regions 5, 7, and 10 reported ILI above region-specific baseline levels. Five states experienced high ILI activity; 1 state experienced moderate ILI activity; 11 states experienced low ILI activity; New York City and 33 states experienced minimal ILI activity, and the District of Columbia had insufficient data to calculate ILI activity.
                      Geographic Spread of Influenza: Fifteen states reported widespread geographic activity; 22 states reported regional influenza activity; 3 states reported local activity; the District of Columbia, Puerto Rico, and 10 states reported sporadic activity, and Guam and the U.S. Virgin Islands reported no influenza activity.
                      Learn more about the weekly influenza surveillance report (FluView) prepared by the Influenza Division.

                      Comment


                      • #26
                        Re: Fluview 2011-2012 Flu Season: Weeks 40-11 (Three Pediatric Deaths; Total Eight)

                        During week 11 (March 11-17, 2012), influenza activity remained elevated in some areas of the United States, but influenza-like-illness continued to be relatively low nationally.
                        3 influenza-associated pediatric deaths; total 8

                        U.S. Virologic Surveillance: Of the 5,088 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, 1,353 (26.6&#37 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: Three influenza-associated pediatric deaths were reported and were associated with 2009 H1N1 (2) and influenza B (1) viruses.
                        Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 2.4%, which is at the national baseline of 2.4%. Regions 5, 6, 7, 8, and 10 reported ILI at or above region-specific baseline levels. Four states experienced high ILI activity; 5 state experienced moderate ILI activity; 10 states experienced low ILI activity; New York City and 31 states experienced minimal ILI activity, and the District of Columbia had insufficient data to calculate ILI activity.
                        Geographic Spread of Influenza: Twenty states reported widespread geographic activity; 20 states reported regional influenza activity; 2 states reported local activity; the District of Columbia, Guam, and 8 states reported sporadic activity, and Puerto Rico and the U.S. Virgin Islands did not report.
                        Learn more about the weekly influenza surveillance report (FluView) prepared by the Influenza Division.

                        Comment


                        • #27
                          Re: Fluview 2011-2012 Flu Season: Weeks 40-12 (Four Pediatric Deaths; Total 12)

                          During week 12 (March 18-24, 2012), influenza activity was elevated in some areas of the United States, but remained relatively low nationally.

                          U.S. Virologic Surveillance: Of the 4,624 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, 908 (19.6%) 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: Four influenza-associated pediatric deaths were reported and were associated with 1 2009 H1N1 and 3 influenza A viruses for which the subtype was not determined.
                          Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 2.0%, which is below the national baseline of 2.4%. Regions 5 and 10 reported ILI above region-specific baseline levels. Three 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 to calculate ILI activity.
                          Geographic Spread of Influenza: Sixteen states reported widespread geographic activity; 21 states reported regional influenza activity; 9 states reported local activity; the District of Columbia, Guam, Puerto Rico, and 4 states reported sporadic activity, and the U.S. Virgin Islands reported no influenza activity.
                          Learn more about the weekly influenza surveillance report (FluView) prepared by the Influenza Division.

                          Comment


                          • #28
                            Re: Fluview 2011-2012 Flu Season: Weeks 40-13 (One Pediatric Death; Total 13)

                            During week 13 (March 25-31, 2012), influenza activity was elevated in some areas of the United States, but declined nationally and in most regions.

                            U.S. Virologic Surveillance: Of the 4,551 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, 932 (20.5%) 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 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%. All regions reported ILI below region-specific baseline levels. Six states experienced low ILI activity; New York City and 44 states experienced minimal ILI activity, and the District of Columbia had insufficient data to calculate ILI activity.
                            Geographic Spread of Influenza: Ten states reported widespread geographic activity; 19 states reported regional influenza activity; 13 states reported local activity; the District of Columbia, Guam, Puerto Rico, and 8 states reported sporadic activity, and the U.S. Virgin Islands reported no influenza activity.
                            Learn more about the weekly influenza surveillance report (FluView) prepared by the Influenza Division.

                            Comment


                            • #29
                              Re: Fluview 2011-2012 Flu Season: Weeks 40-14 (No Pediatric Death; Total 13)

                              During week 14 (April 1-7, 2012), influenza activity was elevated in some areas of the United States, but declined nationally and in most regions.

                              U.S. Virologic Surveillance: Of the 3,607 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, 756 (21.0%) were positive for influenza.
                              Novel influenza A Virus: One human infection with a novel influenza A virus was 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 1.5%, which is below the national baseline of 2.4%. Region 10 reported ILI above its region-specific baseline level. One state experienced moderate ILI activity, 1 state experienced low ILI activity; New York City and 48 states experienced minimal ILI activity, and the District of Columbia had insufficient data to calculate ILI activity.
                              Geographic Spread of Influenza: Ten states reported widespread geographic activity; 9 states reported regional influenza activity; 20 states reported local activity; the District of Columbia, Puerto Rico, and 11 states reported sporadic activity, and Guam and the U.S. Virgin Islands reported no influenza activity.

                              One human infection with a novel influenza A virus was detected in a child in Utah. The child was infected with an influenza A (H3N2) variant virus similar to those identified in the 12 human infections that occurred between July and November 2011 in Indiana (2), Pennsylvania (3), Maine (2), Iowa (3) and West Virginia (2). The child has recovered. Contact with swine in the week preceding onset of the child?s illness was reported. State public health and agriculture officials are investigating case contacts and sources of exposure; no additional confirmed cases have been detected at this time. Additional information on these cases can be found in the CDC Flu Spotlight posting.
                              Learn more about the weekly influenza surveillance report (FluView) prepared by the Influenza Division.

                              Comment


                              • #30
                                Re: Fluview 2011-2012 Flu Season: Weeks 40-15 (Two Pediatric Death; Total 15)

                                During week 15 (April 8-14, 2012), influenza activity was elevated in some areas of the United States, but declined nationally and in most regions.

                                U.S. Virologic Surveillance: Of the 3,730 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, 653 (17.5%) 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: Two influenza-associated pediatric deaths were reported. One was associated with a 2009 H1N1 virus and one was associated with a seasonal influenza A (H3) virus.
                                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%. Region 10 reported ILI above its region-specific baseline level. Two states experienced low ILI activity; New York City and 48 states experienced minimal ILI activity, and the District of Columbia had insufficient data to calculate ILI activity.
                                Geographic Spread of Influenza: Six states reported widespread geographic activity; 9 states reported regional influenza activity; 17 states reported local activity; the District of Columbia and 18 states reported sporadic activity; Guam and the U.S. Virgin Islands reported no influenza activity, and Puerto Rico did not report.
                                Learn more about the weekly influenza surveillance report (FluView) prepared by the Influenza Division.

                                Comment

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