All non-urgent surgery was cancelled and some wards have been affected by the winter vomiting bug.

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Levels of the winter vomiting bug norovirus have gone down for a second week, latest figures show.

BBC: Drop in level of norovirus winter vomiting bug cases

Cases of the winter vomiting bug norovirus have exceeded 1.1 million, figures for England and Wales suggest.

BBC: Winter vomiting cases at 1.1 million

There was also a rise in cases of the winter vomiting bug, norovirus, in the last week of 2012.

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Winter vomiting bug has been the cause of more than 1, 000 hospital ward closures since 2009, according to Scottish government figures.

BBC: Norovirus caused more than 1,000 Scottish ward closures

Levels of the winter vomiting bug dipped over the Christmas period, but are likely to go up again as people return to work and school, experts say.

BBC: Winter vomiting bug norovirus levels dip over Christmas

There are more cases of norovirus - or winter vomiting bug - around than in recent years, but we are a long way off the peak of early 2010.

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The cold weather is thought to have been responsible for an increase in the number of chest infections requiring hospital treatment and there have also been several outbreaks of the winter vomiting bug norovirus.

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Britain's National Health Service says that the two most common causes of gastroenteritis in adults are food poisoning and the norovirus, a common winter vomiting bug which typically afflicts between 600, 000 and 1 million Britons each year.

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Health experts are warning of an unusually severe winter outbreak of the norovirus diarrhoea and vomiting bug.

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