GP: 'Gastroenteritis is very common'
1 March 2013 Last updated at 22:32 GMT
The Queen has cancelled a planned trip to Swansea to celebrate St David's Day because she has developed symptoms of a stomach bug.
Dr Richard Vautrey, a Leeds based GP, told the BBC that gastroentiritis usually does not last very long and is very common.
He said there is always a risk when someone is frail.