Dr. Philip Tierno
Monday, January 02, 2012
By Kathleen Horan : Reporter, WNYC News
Walk onto any subway car, especially during a crowded commute, and you're likely to see a bag or two on the floor. Putting a bag down on the ground may lighten the load for a while, but riders may want to think about the hygiene of their bag once it is picked up. It may be toting more than just dirt.