I haven't succumbed to the dreaded lurgy yet, but I had a monster flu about 6 months ago with a 104° fever. I relented and went to the ER for that one and got a dose of five-day antibiotic (azithromycin I believe,) and ended up with a mangled olfactory sense that seems permanent. Now I frequently smell a metallic/smoky odor, not sure if it was the antibiotic or the flu that caused it...