I feel really sorry for her and her family, it must be dreadful.
However she didn't tell them she was on medication and had ongoing health conditions - If you are on any medication or have any ongoing condition it does show its worth telling the insurers and swallowing the slightly increased premium upfront. I have epilepsy so my holiday insurance is always a few pounds higher
Hope she manages to pull through :(
woman fights for life on dream holiday but insurer won't pay £200k bill"