Coalition party leaders are set to meet NPHET officials later to discuss the new Covid variant.
Regulations on new travel and home quarantine policies are being drawn up.
It's expected NPHET will meet today to hear the latest from its Epidemiological Surveillance Team on the fast paced rise of the Omicron variant.
Chief Medical Officer Dr Tony Holohan met with Health Minister Stephen Donnelly yesterday with officials also analysing the early international data available.
Last night the CMO said new regulations are being drawn up to give effect to new travel and home quarantine rules.
While everyone who arrived to Ireland from Botswana, Eswatini, Lesotho, Mozambique, Namibia, South Africa or Zimbabwe since November 1st are being asked to isolate and present for PCR testing, regardless of whether or not they have symptoms.
The coalition party leaders will meet with NPHET officials this evening to discuss the situation.
But no meeting of the Cabinet sub-committee on Covid was scheduled as of last night.
The sub-committee is usually a precursor to any further measures being brought in.
A full Cabinet meeting is due on Tuesday, should NPHET recommend any further measures be taken to insulate Ireland from the Omicron variant.