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#Update: Increase in #Human #Infections with #Avian #Influenza #H7N9 Viruses During the 5th #Epidemic — #China, Oct. ‘16–Aug. 7 ‘17 (@CDCgov, edited)

Title : #Update: Increase in #Human #Infections with #Avian #Influenza #H7N9 Viruses During the 5th #Epidemic — #China, Oct. ‘16–Aug. 7 ‘17....

12 May 2017

Weekly #US #Influenza #Surveillance #Report - 2016-17 Season, Wk 18 ending May 6 ‘17 (@CDCgov, summary)


Title: Weekly #US #Influenza #Surveillance #Report - 2016-17 Season, Wk 18 ending May 6 ‘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.

Code: [     ]


Weekly U.S. Influenza Surveillance Report  - 2016-2017 Influenza Season Week 18 ending May 6, 2017


Language: [ English (US) | Español ]


|-- Full report also available as PDF –|

All data are preliminary and may change as more reports are received.



    • During week 18 (April 30-May 6, 2017), influenza activity decreased in the United States.
  • Viral Surveillance:
    • The most frequently identified influenza virus type reported by public health laboratories during week 18 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:
    • Two influenza-associated pediatric deaths were reported.
  • Influenza-associated Hospitalizations:
    • A cumulative rate for the season of 64.3 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 1.6%, which is below the national baseline of 2.2%.
    • All ten regions reported ILI below their region-specific baseline levels.
    • One state experienced low ILI activity; New York City, Puerto Rico, and 49 states experienced minimal ILI activity; and the District of Columbia had insufficient data.
  • Geographic Spread of Influenza:
    • The geographic spread of influenza in one state was reported as widespread; Guam and seven states reported regional activity; Puerto Rico and 14 states reported local activity; the District of Columbia and 28 states reported sporadic activity; and the U.S. Virgin Islands reported no activity.



Keywords: USA; Updates; US CDC; Seasonal Influenza.