for us, how does it work? >> reporter: jon, this is really interesting. this device we're talking about was created by doctors at the university of florida at their medical center, and what it does is it does detect whether or not a doctor or a nurse has used enough of this hand sanitizing gel before they actually go to work and spend time with a patient at the hospital. the cdc says that every single year hospitals, when they treat patients with these hospital-borne infections, it costs up to $60 billion a year. remember, jon, medicare and medicaid announced last year they would no longer be reimbursing hospitals for those infections, so they had to come up with something. take a listen. nurses and doctors at the university of florida medical center are getting warned. if they get too close to patients without washing their hands. inside the neurointensive care unit, all staff must wear electronic badges, id that sends signals warning if they don't