The HSE has put visitor restrictions in place in Cavan General Hospital to try and prevent the spread of the winter vomiting bug.
There has been an increase in the numbers of people being admitted to the hospital with the Norovirus. In an attempt to prevent the spread of the virus, the HSE has limited visits to patients.
Parents are asked not to bring children while flowers and fruit are forbidden.
Relatives of seriously ill patients will continue to have access to the hospital by prior arrangement with the ward.
Elsewhere, the HSE is asking people not to visit either St Vincent's Care Centre in Athlone or the Midland Regional Hospital in Portlaoise.
The plea comes as a result of a number of suspected cases of the winter vomiting bug within both facilities.
In order to assist staff in curtailing the spread of this potentially dangerous virus, which is particularly unsafe to both the very young and the very old, it is imperative that no visiting takes place during this period.
Infection prevention and controls procedures will remain in place in both Athlone and Portlaoise until further notice.