National Center for Immunization and Respiratory Diseases (U.S.). Influenza Division.

All data are preliminary and may change as more reports are received. Synopsis: During week 14 (April 3-9, 2016), influenza activity decreased, but remained elevated in the United States. • Viral Surveillance: The most frequently identified influenza virus type reported by public health laboratories during week 14 was influenza A, with influenza A (H1N1)pdm09 viruses predominating. 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 NCHS Mortality Surveillance System and above the system-specific epidemic threshold in the 122 Cities Mortality Reporting System. • Influenza-associated Pediatric Deaths: Ten influenza-associated pediatric deaths were reported. • Influenza-associated Hospitalizations: A cumulative rate for the season of 26.6 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 2.1%, which is at the national baseline of 2.1%. Six of 10 regions reported ILI at or above region-specific baseline levels. One state experienced high ILI activity; Puerto Rico and one state experienced moderate ILI activity; 11 states experienced low ILI activity; New York City and 36 states experienced minimal ILI activity; and the District of Columbia and one state had insufficient data. External_F1614.pdf

Newsletter

United States

Stephen B. Thacker CDC Library collection