what's dirtier

What’s Dirtier: Cell Phone Or Public Toilet Seat?
What’s Dirtier: Cell Phone Or Public Toilet Seat?
What’s Dirtier: Cell Phone Or Public Toilet Seat?
I'll never forget the little sign over a public toilet at the Conoco gas station near my high school. It read: "Our aim is to keep this toilet clean...Your aim will help!" That memory would never have resurfaced if not for an article I was reading by the Department of Molecular Microbiology and Immunology at the University of Southern California...