2015-2016 Influenza Season Week 9 ending March 5, 2016
The most recent FluView report shows increasing flu activity in the United States. Ongoing flu activity is expected for several weeks.
CDC reports this season’s flu vaccine is nearly 60 percent effective against all circulating viruses. It is not too late to get your flu vaccine this season.
CDC recommends a yearly flu vaccine for everyone 6 months and older. Vaccination can reduce flu illnesses, doctors' visits, and missed work and school due to flu, as well as prevent flu-related hospitalizations. More than 146.4 million doses of flu vaccine have been distributed in the United States.
With several weeks of flu activity still to come, getting vaccinated now can still offer protection. Find a Vaccine.
During week 9 (February 28-March 5, 2016), influenza activity remained elevated in the United States.
- Viral Surveillance: The most frequently identified influenza virus type reported by public health laboratories during week 9 was influenza A, with influenza A (H1N1)pdm09 viruses predominating. The percentage of respiratory specimens testing positive for influenza in clinical laboratories increased.
- Pneumonia and Influenza Mortality: The proportion of deaths attributed to pneumonia and influenza (P&I) was below their system-specific epidemic threshold in both the NCHS Mortality Surveillance System and the 122 Cities Mortality Reporting System.
- Influenza-associated Pediatric Deaths: Two influenza-associated pediatric deaths were reported.
- Influenza-associated Hospitalizations: A cumulative rate for the season of 10.4 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 3.5%, which is above the national baseline of 2.1%. All 10 regions reported ILI at or above region-specific baseline levels. Puerto Rico and 10 states experienced high ILI activity; New York City and 13 states experienced moderate ILI activity; 12 states experienced low ILI activity; 15 states experienced minimal ILI activity; and the District of Columbia had insufficient data.
- Geographic Spread of Influenza: The geographic spread of influenza in Puerto Rico and 37 states was reported as widespread; Guam and 13 states reported regional activity; the District of Columbia reported local activity; and the U.S. Virgin Islands reported sporadic activity.