Queen Elizabeth has been released after spending two days in the hospital with what was suspected to be norovirus.

“The Queen has left The King Edward VII’s hospital, having been admitted briefly as part of the assessment of symptoms of gastroenteristis,” Buckingham Palace said early afternoon Monday, London time.

Royal sources had said Her Majesty, 86, seemed in “good spirits” Sunday, and that the admission to the hospital was strictly precautionary.

It was the first time in 10 years the Queen had been hospitalized. It was not known if food was involved in transmitting the virus.