Management at Cork University Hospital have appealed to people not to visit patients there because of an outbreak of flu, which is affecting emergency admissions and discharges.
Strict visitor restrictions have been introduced to curb the spread of the illness, which has been described as "highly contagious".
Each patient is being restricted to one named visitor per day, with no children allowed visit.
Consultants at the hospital say the current outbreak of flu is affecting two wards in particular.
They say patients with flu cannot be admitted to a ward or discharged to other healthcare facilities.
Hospital management says security staff are ensuring that the restrictions are being imposed.
People with queries are asked to contact the hospital in advance on 021-4922000.
Beaumont Hospital in Dublin also has visiting restrictions in place to prevent the spread of flu.