Ever since I hit my 40's, I've found that I can no longer recover from a cold as I used to do. The cold itself might go away in about a week, but I always keep coughing for a month afterwards (no exaggeration). Does anyone else have this problem? Does anyone have any idea what could be causing it? I don't smoke (never have) or spend any time in smoky environments. It's just very aggravating that I have to spend weeks coughing and hacking every time I come down with a simple cold.