Influenza Hospitalization Surveillance
Active surveillance for hospitalized laboratory–confirmed influenza cases among Rochester area residents has been conducted since 2004. Laboratory-confirmed influenza is reportable to the New York State Department of Public Health; EIP staff collect data to determine underlying conditions, influenza testing patterns, and markers of disease severity.
Goals and Objectives
- Determine the age-specific rates of laboratory confirmed influenza associated hospitalization.
- Determine the rate of serious influenza-associated complications, such as secondary bacterial infections, and the need for ICU admission/mechanical ventilation.
- Identify factors that are associated with severe illness or influenza-associated complications.
- Evaluate adherence to influenza vaccination recommendations.
Active surveillance for laboratory-confirmed influenza hospitalizations is conducted among residents of the seven county Rochester catchment area. A case is defined as a resident in the catchment area having a hospital admission with a laboratory confirmed influenza infection. Demographic, diagnostic, medical and vaccination histories are collected from the medical charts of cases and are recorded on a standardized case report form.
Comprehensive and aggregate data analyses for this project are ongoing and available at the following websites:
The incidence of influenza hospitalizations varies each season and by age group, depending on what strain of influenza is most prominent and the efficacy of the vaccine.
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