I wonder what goes through the minds of the guardian's editors when they write titles like this. "Woman treated by doctors" isn't a story. One hopes that _everyone_ whose blood turns blue would be treated by doctors.
Subject, Action, important qualifiers.
And if she was famous and her name to have any relevance to the readers, then instead of "a woman" it would be her name in the title ("X treated for ...", and ditto for a man).
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...
It had a beginning, a middle, and a happy ending. And it contained useful information about not using too much of this stuff, or use it for too long.