I pray it is only a stomach virus, or even latent airsickness.
In the event she has Ebola, she's symptomatic, and anyone moving through that part of the plane has been exposed (plus cabin crew, cleaning crew, EMS, etc.).
The description of “violently ill”, reminds me a little too much of Patrick Sawyer. I pray that is not the case.
What do you suppose the chances are that they decontaminated the plane—at least the areas where this child was, just as a precautionary measure? I am thinking it is not likely.
I hope she feels better soon. She must have been (and may still be) terrified.