Researchers from Weill Cornell Medical College have spent the last 18 months scouring the New York Subway in the search for a DNA profile of the system. They even created a map of the 15,152 microbes they found.
Feb 6, 2015   Science Daily
Seen across the Internet this week: a picture of a crazy (brilliant?) idea for stabilizing one's self on a subway car without touching any germ-filled surfaces. It may not be the wildest thing you'll see on a Tokyo subway, but it's probably close.
Jun 28, 2013   Rocket News 24