While it is no longer commonly used in English, it is still recognized as a synonym for the flu.
Here's why it's not used as much anymore:
* Outdated: The term "grippe" is considered outdated and replaced by the more modern "influenza."
* Specificity: "Influenza" is more specific, referring to a particular type of viral infection, while "grippe" was a broader term for any kind of cold or flu-like illness.
So, if you hear someone say "grippe," they're likely referring to the flu.