noun

influenza

influenza, flu

He is off work with influenza.

He is off work with influenza.

The influenza epidemic was severe last winter.

The influenza epidemic was severe last winter.

to have/catch influenza to be ill with influenza. Many people catch influenza in winter.

Synonyms: flu, grippe

From Italian 'influenza', meaning 'influence' (of the stars), as outbreaks were once attributed to astrological influence.

Imagine the 'influence' of a virus spreading through a population. The word is often shortened to 'flu'.

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