A 25-year-old British girl, Fran Jill, returned to zero after she was unable to identify her closest family and friends, according to a story in the British newspaper Mirror.
After the operation, the Gilles family was surprised that their daughter was a very different person "after her memories were cleared because of a rare brain infection, in which the body's immune system starts attacking intact brain cells.
The marine biologist, from Cornwall, UK, lost all she knew, including her five-year university education, and now she has to learn how to get to know everything around her again.
"I did not imagine meeting people I had known for years as a first encounter, it's really sad, I also feel that I meet myself again, because I have absolutely no idea what I was like before."
"People say that I am a new person and that I am a different person and that they have to accept it, all I want is to get back to my beautiful old memories," she said. "Doing the simplest things, like using a computer or moving in a supermarket, "He said.
"It's sad that all the years I have spent have been erased as one of them chalks off the board," Gill said.