"We have seen patients make remarkable improvements after being in a coma for a long time, but the best prognostic indicator is how one does over time, " Black said.

CNN: Sharon brain results not proof he'll wake up

What is clear is that by the time she arrived at a hospital, Jimenez was in a coma, and her body temperature topped 108 degrees.

NPR: Teen Farmworker's Heat Death Sparks Outcry

Every day I was in a coma, my parents prayed for me and for it not to be my time, and to come back to them.

CNN: Teen beating the odds after brain injury