This article prompted me to go out and buy handkerchiefs.
“A single wayward sneeze from a rush-hour commuter can end up giving up to 150 fellow passengers a cold in just five minutes, researchers have found.
Unless they are contained in a tissue or handkerchief, the germs spread so quickly that within seconds they are being passed on via handrails on escalators or seats on trains, said their study.”
A Chiropractor's Opinion 