Does the flu have any impact on the filler?

There is no known correlation between Juvederm and the symptoms you describe.  At nine months post treatment some, if not much of the Juvederm you had injected is probably gone.  I would check with your doctor if you continue to experience these symptoms.

Getting a cold or even the flu shouldn’t have any effect on your fillers, especially nine months after your initial injections. It could be mere a coincidence that the pain you’re feeling happens to be in the same spot that you’ve had injections. But if you’re experiencing significant pain or discomfort, I would suggest talking to your doctor to try to figure out what could be going wrong.

Thank you for your question.  Having the flu should not affect your Juvederm.  If you continue to have concerns, please be sure to see your doctor for an in-person  examination in order to determine the best course of action.  Hope this helps and best wishes!