The National Public Health Emergency Team is trying to track those who came in contact with the first case of Covid-19 confirmed in Cork.
It's believed that it's the country's first community transmission.
The middle-aged man presented at Cork University Hospital a number of days ago. He had not travelled to northern Italy.
The chief medical officer with the Department of Health, Dr Tony Holohan, said that staff who came into contact with the patient are now self-isolating at home.
Outpatient appointments at CUH have been cancelled and visitor restrictions are in place.
At a press conference last night, it was confirmed that there are seven new cases of coronavirus in the Republic of Ireland, including the Cork case, bringing the total to 13.
Four men from the east of the country picked it up after travelling to northern Italy.
Two women in the west got the illness from close contact with another confirmed case.
Trinity College Dublin has confirmed one of the seven new cases of coronavirus was diagnosed at its campus.
In a letter to staff and students, the university says the HSE will trace anyone who's been in contact with the affected person.
Some areas of the campus have been closed as a precaution.
