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Influenza (Flu) - Previous Years |
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The charts below show the number of influenza-like illnesses and influenza cases
reported in Williamson County for previous flu seasons in Williamson County.
* Influenza-like illness (ILI) — Fever (temperature of
≥100ºF [37.8 ºC]) and a cough and/or a sore throat in the absence of a
known
cause other than influenza.
** Influenza (“flu”) — Illness due to influenza virus as
confirmed by laboratory testing. Different types of laboratory testing
may be performed to detect the influenza virus. Flu cases confirmed
with different tests are combined under the category “total flu” for
reporting purposes.
- Rapid flu testing—often used in health care provider’s office or emergency
room. Rapid tests may not differentiate between influenza A and
influenza B.
- Viral culture—isolating the influenza virus from a specimen takes longer,
but can provide specific information about the strains and subtypes of virus
impacting a community. Culture is currently the primary means for
detecting a new or novel influenza A virus or an influenza virus that is
resistant to drugs.
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