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Influenza-like Illness Surveillance (ILINet)

Lowest granularity
Weekly
Latest date with data
05/05/2024
Expected update frequency
Every week
Last updated on
05/29/2024
Next update expected on
06/05/2024
Locations available for download
Delaware
Description
Information on outpatient visits to health care providers for influenza-like illness (ILI) is collected through the U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet). ILINet consists of outpatient healthcare providers in all 50 states, Puerto Rico, the District of Columbia and the U.S. Virgin Islands. For this system, ILI is defined as fever (temperature of 100°F [37.8°C] or greater) and a cough and/or a sore throat. The case definition no longer includes “without a known cause other than influenza”. Sites with electronic health records use an equivalent definition as determined by public health authorities. Since ILINet monitors visits for ILI and not laboratory-confirmed influenza, it will capture visits due to any respiratory pathogen that presents with ILI symptoms. The national percentage of patient visits to healthcare providers for ILI reported each week is calculated by combining state-specific data weighted by state population.
Rationale
For Flu tracking and surveilance dashboard
Citation
Centers for Disease Control. U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet). https://wwwn.cdc.gov/ILINet/
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Indicators
Name Indicator Type Latest Date With Data
Percentage of visits for influenza-like illness (ILI) reported by sentinel providers Crude Percentage 05/05/2024
More Information
Data Source
U.S. Outpatient Influenza-like Illness Surveillance Network (ILINET)
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