A public health expert says mandatory hotel quarantine needs to be brought in sharpish, after the Brazilian strain was detected here.
Three cases of the new covid 19 variant have been identified, all linked with recent travel from Brazil.
It comes as 679 new cases of covid 19 have been confirmed and 1 more person with the virus has died.
Elsewhere across the region, there are 22 new cases in Mayo, 48 in Galway and less than five in Sligo.
There were no new cases recorded in Roscommon or Leitrim.
DCU Professor Anthony Staines says the close contacts of the infected patients with the Brazilian strain are unknown