Title: Weekly #US #Influenza #Surveillance #Report - 2016-17 Season, Wk 16 ending Apr. 22 ‘17.
Subject: Human Influenza Viruses, seasonal winter epidemic in the US, current situation.
Source: US Centers for Disease Control and Prevention (CDC), FluView, full page: (LINK). Summary.
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Weekly U.S. Influenza Surveillance Report - 2016-2017 Influenza Season Week 16 ending April 22, 2017
All data are preliminary and may change as more reports are received.
- During week 16 (April 16-22, 2017), influenza activity decreased in the United States.
- Viral Surveillance:
- The most frequently identified influenza virus type reported by public health laboratories during week 16 was influenza B.
- 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:
- Six influenza-associated pediatric deaths were reported.
- Influenza-associated Hospitalizations:
- A cumulative rate for the season of 62.7 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 1.8%, which is below the national baseline of 2.2%.
- Two of ten regions reported ILI at or above their region-specific baseline levels.
- Four states experienced low ILI activity; New York City, Puerto Rico, and 46 states experienced minimal ILI activity; and the District of Columbia had insufficient data.
- Geographic Spread of Influenza:
- The geographic spread of influenza in seven states was reported as widespread; Guam, Puerto Rico and 11 states reported regional activity; the District of Columbia and 19 states reported local activity; 13 states reported sporadic activity; and the U.S. Virgin Islands reported no activity.
Keywords: US CDC; USA; Updates; Seasonal Influenza.