DMedic, some of the people replying in this thread are EMTs and ER nurses, and they all pretty much seem to think that the charges seem reasonable based on what we know.
This nurse losing her license is probably warranted. Facing criminal charges is absurd. There is no evidence of any malicious intent; unless you've never made a serious mistake in your job, I wouldn't throw the first stone. Maybe the nurse misunderstood her symptom descriptions, maybe she just made a big mistake and should lose her license and be held civilly liable. But the moment you start throwing medical professionals in jail for messing up (even for serious mistakes) you're going to radically change the health care system and you won't like how it ends up.