FluView: 2017–2018 Influenza Season: Week 18 ending May 5, 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 18 (April 29-May 5, 2018), influenza activity decreased in the United States.
  
  • Viral Surveillance: Overall, influenza A(H3) viruses have predominated this season. Since early March, influenza B viruses have been more frequently reported than influenza A viruses. 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 below the system-specific epidemic threshold in the National Center for Health Statistics (NCHS) Mortality Surveillance System.
  
  • Influenza-associated Pediatric Deaths: Two influenza-associated pediatric deaths were reported.
  
  • Influenza-associated Hospitalizations: A cumulative rate of 106.5 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 1.5%, which is below the national baseline of 2.2%. One of 10 regions reported ILI at or above their region-specific baseline level. Puerto Rico and one state experienced low ILI activity; and New York City, the District of Columbia, and 49 states experienced minimal ILI activity.
  
  • Geographic Spread of Influenza: The geographic spread of influenza in three states was reported as widespread; Guam, Puerto Rico and four states reported regional activity; 16 states reported local activity; the District of Columbia, and 25 states reported sporadic activity; and the U.S. Virgin Islands and two states reported no influenza 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:
  18
• Collection(s):
  Stephen B. Thacker CDC Library
• Main Document Checksum:
  urn:sha-512:2dafa130fb52b0e65717dff4e235111d854056f4141dbd0cd70430b8f342be54ff6aeed2524eabab65ff3e05922b4614c60ee3b78e008f014aaf85b50c006d6f
• Download URL:
  https://stacks.cdc.gov/view/cdc/53896/cdc_53896_DS1.pdf
• File Type:
  [PDF - 731.15 KB ]