Not "tu as une fièvre "?
tu as une fièvre is not accepted. Dec 2020
It is still not accepted (Feb 2022) yet it is accepted elsewhere in this group of exercises.
Why not tu as la fievre?
how about : tu as très chaud au front, tu as de la fièvre
That should be accepted.
I thought "tu as une fièvre" is accepted. I read the comment by MOD CommeuneTexane in https://forum.duolingo.com/comment/27516560