A further 13 countries have been added to the list of "high-risk" countries.
A leading immunologist has urged the government to "get on top of" travel restrictions to keep new Covid variants out of the country.
A further 13 countries - including Argentina, Colombia and Venezuela - have been added to the list of "high-risk" countries.
There are now a total of 33 countries on it - and anyone arriving from those places has to self-quarantine for 14 days.
Mullingar's Kingston Mills, an immunology professor at Trinity College Dublin, says strict travel rules are crucial: