Recurrent Hypersomnia: British Girl Sleeps for Days

Last Friday on NBC, TODAY told the story of a British girl with a rare sleep disorder that causes her to sleep for days.Louisa Ball, a 15-year-old, suffers from Kleine-Levin syndrome. It is one form of a sleep disorder called recurrent hypersomnia.She had flu-like symptoms just over a year ago. Not long after that, she had her first period of severe, extended sleepiness. Her longest stretch of