(Vancouver, WA)  --  Officials say a disabled Vancouver woman, whose body was found in her apartment, died of blunt-force trauma to the head.  The body of 66-year-old Sharon Allison was found around 11:30 a.m. Saturday, during a welfare check at the apartment on West 24th Street.  Police haven't identified any suspects.  Anyone with information helpful to the investigation is asked to call 360-487-7420.