Dealgan House Nursing Home in Dundalk, Co Louth, has confirmed that two staff have tested positive for Covid-19.
It said the staff had been fully vaccinated and had their second dose in February.
They were found to have the virus recently during routine serial testing, which is conducted fortnightly in the home.
The staff had displayed no symptoms.
The nursing home said that all residents there have been vaccinated and it has temporarily suspended visits pending advice from public health.