Three cases of a Brazilian variant of Covid-19 have been found here for the first time.
All the cases are associated with travel from Brazil.
The deputy chief medical officer, Ronan Glynn, says the strain is possibly more transmissible.
763 new cases of Covid were confirmed here yesterday, along with 28 additional deaths.
703 people are in hospital with the virus, with 151 in intensive care.
The Deputy Chief Medical Officer is reminding recent travellers from Brazil that they legally have to quarantine at home for 14 days.
Dr Ronan Glynn is also asking them to contact a GP to arrange for a Covid-19 test.
For latest advice and updates on Covid-19 visit Level restrictions and latest statistics - from gov.ie
