Staff at St Vincent's Hospital in Dublin are today appealing to the public not to bring children to the hospital, in a bid to curtail the winter vomiting virus.
The facility currently has 37 cases of the virus and a spokesperson said that past experience has shown that it can spread very quickly unless appropriate steps are taken.
Members of the public are asked to avoid visiting the hospital if possible and to limit numbers to one person at a time.
People who have symptoms such as "upset tummy" should not attend the hospital but contact their GP if they have serious concerns.