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comaLive Science
•75% Informative
A person in a coma can sometimes wake up months , years or even decades after they fell unconscious.
For a coma to occur, there must be an insult to the brain — such as an injury, inflammation or infection.
Before a person can wake up, their brain needs to recover by regrowing damaged neurons or expanding on other brain networks to take over the job of the injured brain region.
Scientists don't have much data about the frequency and causes of comas.
The percentage of those who never wake up is somewhere between 20% and 40% .
A study of people in comas in the U.S. and UK found 54% of patients died, 15% survived with poor outcomes.
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65
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informal
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English
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Source diversity
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