Update: Influenza Activity — United States, September 28, 2014–February 21, 2015

Details

• Journal Article:
  Morbidity and Mortality Weekly Report (MMWR)
• Personal Author:
  D’Mello, Tiffany ; Brammer, Lynnette ; Blanton, Lenee ; Kniss, Krista ; Smith, Sophie ; Mustaquim, Desiree ; Steffens, Craig ; Dhara, Rosaline ; Cohen, Jessica ; Chaves, Sandra S. ; Finelli, Lyn ; Bresee, Joseph ; Wallis, Teresa ; Xu, Xiyan ; Abd Elal, Anwar Isa ; Gubareva, Larisa ; Wentworth, David ; Villanueva, Julie ; Katz, Jackie ; Jernigan, Daniel
• Corporate Authors:
  World Health Organization Collaborating Center for Surveillance, Epidemiology, and Control of Influenza
• Description:
  Influenza activity in the United States began to increase in mid-November, remained elevated through February 21, 2015, and is expected to continue for several more weeks. To date, influenza A (H3N2) viruses have predominated overall. As has been observed in previous seasons during which influenza A (H3N2) viruses predominated, adults aged ≥65 years have been most severely affected. The cumulative laboratory-confirmed influenza-associated hospitalization rate among adults aged ≥65 years is the highest recorded since this type of surveillance began in 2005. This age group also accounts for the majority of deaths attributed to pneumonia and influenza. The majority of circulating influenza A (H3N2) viruses are different from the influenza A (H3N2) component of the 2014-15 Northern Hemisphere seasonal vaccines, and the predominance of these antigenically and genetically drifted viruses has resulted in reduced vaccine effectiveness. This report summarizes U.S. influenza activity* since September 28, 2014, and updates the previous summary.
• Subjects:
  Adolescent Adult Aged Age Distribution Cause Of Death Child Child, Preschool Comorbidity Drug Resistance, Viral Female Hospitalization Humans Infant Infant Mortality Influenza, Human Influenza A Virus, H1N1 Subtype Influenza A Virus, H3N2 Subtype Influenza B Virus Influenza Vaccines Male Middle Aged Outpatients Pneumonia Population Surveillance Pregnancy Seasons Survival Rate Young Adult

  More +
• Source:
  MMWR Morbidity Mortal Weekly Rep. 2015; 64(8):206-212.
• Series:
  Weekly Report: Morbidity and Mortality Weekly Report (MMWR)
• ISSN:
  0149-2195 (print) ; 1545-861X (digital)
• Pubmed ID:
  25742380
• Pubmed Central ID:
  PMC4584716
• Document Type:
  Journal Article
• Place as Subject:
  United States
• Pages in Document:
  7 pdf pages
• Volume:
  64
• Issue:
  8
• Collection(s):
  Morbidity and Mortality Weekly Report (MMWR)
• Main Document Checksum:
  urn:sha-512:3782e8eda6cc71ced6a57899b207a6d1675b4656ee90b021aa6c048a289372e0345cc46239013cb64ac61a576c8a7b870a55607d0471b48aba4fbbece2001ac0
• Download URL:
  https://stacks.cdc.gov/view/cdc/55020/cdc_55020_DS1.pdf
• File Type:
  [PDF - 390.74 KB ]