Thirty patients and three members of staff are believed to have contracted the norovirus.
Hospital managers are now urging people to take all the usual measures to stop the problem from getting worse.
Infection Control Manager Elaine Ross explains more:
More top news
Talks begin today on what new powers should be devolved to Scotland. All five political parties at Holyrood will have their say.
Dialect speakers from around the country have been in the Lake District to celebrate the diversity of the English language.
New figures announced by the Scottish conservatives show an assault on a teacher happens nearly every day in the Scottish Borders.