I lost my sense of smell and taste on 4/29/17. I had a sinus infection for a month but I never really felt very sick. I had 2 courses of antibiodics and 2 courses of prednisone. I have a mucous cyst but my ENT says that is not the cause. I had a Ct scan and it was clear. I go back to the ENT in December. My doctor said maybe I will never regain it. So encouraging.