Latest: Health officials unable to explain source of Cork coronavirus case

Infection outbreak signs have been erected outside the emergency department at Cork University Hospital. No visitors are allowed into the busy unit.

Latest: At tonight's Covid-19 briefing, the chief medical officer, Dr Tony Holohan said they have been able to explain the source of the infection of each of the previous cases but not in the case which has arisen in Cork.

He said that gives rise to the possibility of community transmission but he said that is the pattern the virus has followed as it's spread in other countries.