I just learned from a teacher friend of mine that they're teaching kids these days to cough or sneeze into the crook of their elbow. Which makes a ton of sense as soon as you think about it for two seconds -- "cover your mouth when you sneeze" is fine as far as it goes, but then you're just going to go put those grubby, germ covered hands all over everything. Crook of the elbow. Wave of the future. Pass it on.