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The story is that her blood turned blue, not that she was treated by a doctor. _Of_course_ she was treated by a doctor! Her blood turned blue!

That's not how the world or journalism works. All of what the title says is the story, and there's no "of course" there.

She could have died before see could be seen by a doctor, for example ("Accident victim bleeds blue blood").

She could found out on her own and started a cult ("Woman starts a cult after her blood turned blue")

She could have hidden it, fearing some superstition ("Woman lived with blue-blood disease for decades")

And any other combination of events...