Influenza-Associated Hospitalizations
The Influenza Hospitalization Surveillance Network (FluSurv-NET) conducts population-based surveillance for laboratory-confirmed influenza-related hospitalizations in select counties in the Emerging Infections Program (EIP) states and Influenza Hospitalization Surveillance Project (IHSP) states.
A total of 1,593 laboratory-confirmed influenza-associated hospitalizations were reported by FluSurv-NET sites between October 1, 2019, and December 14, 2019. The overall hospitalization rate was 5.5 per 100,000 population. The highest rate of hospitalization was among adults aged ≥65 (12.7 per 100,000 population), followed by children aged 0-4 (10.9 per 100,000 population) and adults aged 50-64 (5.5 per 100,000 population). Among 1,593 hospitalizations, 855 (53.7%) were associated with influenza A virus, 722 (45.3%) with influenza B virus, 9 (0.6%) with influenza A virus and influenza B virus co-infection, and 7 (0.4%) with influenza virus for which the type was not determined. Among those with influenza A subtype information, 137 (73.3%) were A(H1N1)pdm09 virus and 50 (26.7%) were A(H3N2).
Additional hospitalization surveillance information for current and past seasons and additional age groups:
Surveillance Methods | FluView Interactive
Pneumonia and Influenza (P&I) Mortality Surveillance
Based on National Center for Health Statistics (NCHS) mortality surveillance data available on December 19, 2019, 5.5% of the deaths occurring during the week ending December 7, 2019 (week 49) were due to P&I. This percentage is below the epidemic threshold of 6.6% for week 49.
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