”Those droplets get picked up by the airflow and get transplanted all over the cabin. They actually spread quite far”, Robert Harwood, director of Ansys, said.
Beware especially, though, if you’re sitting directly next to someone with a cold; as you'll see in the video (designed to help advise the Federal Aviation Administration on improving cabin conditions), passengers immediately surrounding the sneezer are basically in for a direct hit of booger vapor.
Watch for yourself to see where the germ blast zone erupts and soon overtakes the cabin. Suddenly, the people wearing those dust masks on planes don't look so silly.