Before doing Front Row on Tuesday night I was worried that my incipient cough would let me down. It had kept me awake most of the night before. In the words of Julian Clary, I sucked on a Fisherman's Friend until a minute before we went live. Fifteen minutes later I was once again amazed to note that I'd got through it all without even thinking of coughing.
I've discussed this with broadcasting people before. How the adrenalin required to do radio or TV somehow shuts down all the receptors that make us want to cough or sneeze. On the stage it's known as "Doctor Theatre". The person on the stage will not feel the need to cough at all. The person down in the audience will find it impossible to stop.