Parts of Tallaght Hospital remain subject to restricted visiting conditions today, following an outbreak of 'norovirus' (winter vomiting bug) on the Dublin 24 campus in recent days.
A member of staff described the bug as "very aggressive".
At present, the affected wards are both located in the National Children's Hospital.
Visitors are asked to contact the relevant ward to ascertain whether visiting is possible.
Tallaght Hospital say that there are still some active cases of norovirus within the hospital, and ask that no more than two people visit a patient at any time.
They also ask visitors to adhere to stipulated visiting times - between 2pm and 4pm in the afternoon and between 6:30pm and 8:30pm in the evening.
In addition, children are not allowed to visit the hospital without the express permission of the Clinical Nurse Manager in charge.
Visitors are asked to clean their hands thoroughly both as they enter the building and again when leaving, as the anti-bacterial hand gel has proved effective against the norovirus.
Meanwhile, figures compiled by the Health Protection Surveillance Centre in Dublin, and seen by Independent.ie, reveal a sizeable jump in cases of both rotavirus (gasteroenteritis), norovirus, mumps and influenza.