I asume you have never seen the food preparation area in a Chinese restaurant. I have, and the few germs from the old guy's sneeze are the least of your worries.
Besides, that's why they have sneeze shields in most buffets.
The other day I was eating a dish at my local Chinese restaurant. It was called Fine sum chip. My fortune read "Happier days are definitely ahead for you. Struggle has ended." What did your fortune say?