I guess they didn’t hear she’d been at the hospital multiple times.
If symptoms are bad enough for me to go to the hospital once, I might be convinced something odd happened. The second time, I’d have questions and want answers. YMMV. I had blood work and a stool sample taken in a case of suspected food poisoning. The results and investigation led to a restaurant inspection, temporary shutdown, citation, etc. That was after just one trip to the ER. 
. It makes me wonder if someone downplayed the situation with the HCWs.
