However, "gripa" might be a regional dialect variation or a misspelling.
Here are some other ways to say "flu" in Spanish:
* Influenza: This is the formal medical term.
* Resfriado fuerte: This literally means "strong cold," and it is a common way to refer to a flu-like illness.
* Catarro: This is another word for "cold," and it can also be used to refer to the flu.
If you are unsure which word to use, it's always best to ask a native Spanish speaker.