If that's actually what they're saying, then they are very much in the wrong. But if they're saying they didn't know she was sick? That calls for a different verdict.
Again, the key questions are "What should they have known? What did they know? And when did they know it?"
Yes, you’re correct and it really does hinge on what they knew and believed. It’s difficult to take a stand on most of this type story because the articles don’t spell out exactly what happened and even when you think they do they’re not always correct.