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What is the flu?

The flu (also known as influenza) is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness, and at times can lead to death. The best way to prevent the flu is by getting a flu vaccination each year. For more flu facts, visit the following link: http://www.cdc.gov/flu/keyfacts.htm.



Definitions:

Influenza: Also known as the “flu.”

ILI (Influenza-Like Illness): Defined as temperature ≥100 °F [37.8 °C] and a cough and/or a sore throat in the absence of a known cause other than influenza.

% of Visits for ILI=

CDC Week: A new influenza surveillance season begins the first week of October (week 40) and continues through the end of September (week 39) of the following year. A “week” is defined as Sunday-Saturday. To access the “CDC Week” calendar, click here.

Jefferson County Data:

Jefferson County ILI data is submitted by four physicians’ offices and the Jefferson County Department of Health (JCDH) clinics. These providers submit data year round to the Centers for Disease Control and Prevention (CDC). ILI data for the six JCDH health clinics is generated by electronic medical records (EMR).

U.S. Data:

The Centers for Disease Control and Prevention (CDC) provides weekly updates of the percentage of ILI visits within the U.S. http://www.cdc.gov/flu/weekly/usmap.htm

If you have any questions regarding influenza surveillance in Jefferson County, please contact the JCDH Disease Control department at 205-933-9110.