U.S. Influenza Surveillance System : purpose and methods
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U.S. Influenza Surveillance System : purpose and methods

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    • Description:
      The Influenza Division at CDC collects, compiles and analyzes information on influenza activity year-round in the United States. FluView, a weekly influenza surveillance report, and FluView Interactive, an online application which allows for more in-depth exploration of influenza surveillance data, are updated each week. The data presented each week are preliminary and may change as more data is received.

      The U.S. influenza surveillance system is a collaborative effort between CDC and its many partners in state, local, and territorial health departments, public health and clinical laboratories, vital statistics offices, healthcare providers, clinics, and emergency departments. Information in five categories is collected from eight data sources in order to:

      • Find out when and where influenza activity is occurring;

      • Determine what influenza viruses are circulating;

      • Detect changes in influenza viruses; and

      • Measure the impact influenza is having on outpatient illness, hospitalizations and deaths.

    • Content Notes:
      U.S. World Health Organization (WHO) Collaborating Laboratories System and the National Respiratory and Enteric Virus Surveillance System (NREVSS) -- Virus Characterization -- Surveillance for Novel Influenza A Viruses -- U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet) -- ILI Activity Indicator Map -- Summary of the Geographic Spread of Influenza -- Hospitalization Surveillance -- National Center for Health Statistics (NCHS) mortality surveillance data -- Influenza-Associated Pediatric Mortality Surveillance System.
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