A homeless campaigner says dealing with coronavirus among those living in hostels and shelters will be a nightmare situation.
Fr Peter McVerry says plans are being put in place in case people need to self-isolate.
He says it is only a matter of time before a homeless person tests positive.
"But in the larger hostels where you could have 30 or 50 people in a hostel, and much of it in shared rooms, it is going to be impossible to isolate everybody who has been in contact with a person who has tested positive."
Meanwhile, the Department of Health says a blanket ban on visitors to hospitals and nursing homes because of the coronavirus outbreak is unnecessary.
Nursing Homes Ireland restricted visiting a number of days ago due to the risk posed by the virus.
The Department says social interaction is a key part of health and well-being among nursing home residents.
Elsewhere, a letter has been sent to schools across the country telling principals not to close unless they are specifically instructed to by the Department of Health.