I won't argue that she's a victim, but will have to agree to disagree about the rest. Regardless of what administrators or CDC official sound bites state, just watching the evening news would likely make most people feel concerned, and possibly even question the accuracy of the official rhetoric.
Even if she was in Cleveland when she learned of her co-workers fate, once she had that info, then she could no longer be considered "low risk" regardless of what was being stated by the CDC. She should never have boarded the plane back to Dallas.
MOO and all that
And now I see your ETA.....