Ward 212 at Aberdeen Royal Infirmary is now closed to new admissions and visitors.
Elaine Douglas fell ill with coronavirus on March 6 and is in recovery.
Police were called to the property in Gladstone Road, Peterhead, late on Saturday night.
Two other people were injured in the crash in Aberdeen on Tuesday last week.
Joan Kane, from Aberdeen, was struck by a red Hyundai in Aberdeen on December 23.