'You're healthy, and then you're falling off a cliff'
                                
                                
                                    (Newser) -
                                    When Sonia Vallabh watched her mother die a horrible death in 2010, caught in limbo between sleep and wakefulness that led to severe dementia, she and her husband, Eric Minikel, wanted answers. The autopsy revealed a harrowing diagnosis: a prion disease called fatal familial insomnia, or FFI, reports the  Boston ...