FluView: 2017–2018 Influenza Season: Week 9 ending March 3, 2018

Details

• Corporate Authors:
  National Center for Immunization and Respiratory Diseases (U.S.). Influenza Division.
• Description:
  All data are preliminary and may change as more reports are received.
  
  During week 8 (February 18-24, 2018), influenza activity decreased in the United States.
  
  • Viral Surveillance: While influenza A(H3) viruses continue to be predominant this season, during week 8 the overall proportion of influenza A viruses is declining and the proportion of influenza B viruses is increasing. The percentage of respiratory specimens testing positive for influenza in clinical laboratories decreased.
  
  • Pneumonia and Influenza Mortality: The proportion of deaths attributed to pneumonia and influenza (P&I) was above the system-specific epidemic threshold in the National Center for Health Statistics (NCHS) Mortality Surveillance System.
  
  • Influenza-associated Pediatric Deaths: Seventeen influenza-associated pediatric deaths were reported.
  
  • Influenza-associated Hospitalizations: A cumulative rate of 81.7 laboratory-confirmed influenza-associated hospitalizations per 100,000 population was reported.
  
  • Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 5.0%, which is above the national baseline of 2.2%. All 10 regions reported ILI at or above region-specific baseline levels. New York City, the District of Columbia, and 32 states experienced high ILI activity; Puerto Rico and nine states experienced moderate ILI activity; six states experienced low ILI activity; and three states experienced minimal ILI activity.
  
  • Geographic Spread of Influenza: The geographic spread of influenza in Puerto Rico and 45 states was reported as widespread; Guam and two states reported regional activity; the District of Columbia and three states reported local activity; and the U.S. Virgin Islands reported no activity.
  
  
• Subjects:
  Disease Outbreaks Influenza, Human/epidemiology Public Health Surveillance
• Series:
  FluView
• Document Type:
  Text
• Genre:
  Newsletter ; Statistics
• Place as Subject:
  United States
• Pages in Document:
  17 numbered pages
• Volume:
  2017
• Issue:
  9
• Collection(s):
  Stephen B. Thacker CDC Library
• Main Document Checksum:
  urn:sha-512:d2a50be294dbf31bbcd2505efd15b51f44f155c68b837ac5141ad5a32a4c88af602c2897b67b3db714884fc3a635bef53e4c83f7759b49b55abb0958f89e3ab8
• Download URL:
  https://stacks.cdc.gov/view/cdc/52420/cdc_52420_DS1.pdf
• File Type:
  [PDF - 706.87 KB ]