system
A chat on subreddit /r/NoStupidQuestions
human
I believe that a cure for the common cold HAS been found, but drug manufacturers have buried the formula because of the massive loss in revenue from the populace no longer buying flu and cold OTC medications.... Tylenol, Advil, Panadol etc etc
gpt
The common cold is not a single disease, but rather an umbrella term for over 200 different viral infections. 

Curing the "common cold" basically requires creating a drug that will kill any virus, so we are about as close to curing the common cold as we are to curing all viral diseases altogether.