Global & Disaster Medicine

2016-2017 Influenza Season Week 10 ending March 11, 2017

CDC

Synopsis:

During week 10 (March 5-11, 2017), influenza activity decreased, but remained elevated in the United States.

  • Viral Surveillance: The most frequently identified influenza virus subtype reported by public health laboratories during week 10 was influenza A (H3). 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: Five influenza-associated pediatric deaths were reported.
  • Influenza-associated Hospitalizations: A cumulative rate for the season of 46.9 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 3.7%, which is above the national baseline of 2.2%. Seven of ten regions reported ILI at or above their region-specific baseline levels. 18 states experienced high ILI activity; seven states experienced moderate ILI activity; five states experienced low ILI activity; New York City, Puerto Rico, and 20 states experienced minimal ILI activity; and the District of Columbia had insufficient data.
  • Geographic Spread of Influenza: The geographic spread of influenza in 36 states was reported as widespread; Guam, Puerto Rico and 11 states reported regional activity; the District of Columbia and three states reported local activity; and the U.S. Virgin Islands reported no activity.

INFLUENZA Virus Isolated

Click on image to launch interactive tool

Click on graph to launch interactive tool

national levels of ILI and ARI

Weekly Flu Activity Map: Week 10

 


Leave a Reply

Categories

Recent Posts

Archives

Admin