Duncan's lab samples were sent through the usual hospital tube system “without being specifically sealed and hand-delivered. The result is that the entire tube system … was potentially contaminated,” they said.
Indeed. When Emory, one of the 4 specialist hospitals with 3 beds set up for pathogens like this, received their first Ebola patient, they quickly realized sending samples to their main lab was a non-stater. One "oops" and you'd have to shut it down for decontamination, while your other patients are left hanging. This Dallas hospital is rather large at 900 beds, so that would be ... bad.
/Facepalm