Walk-in vaccination centres are open around the country this weekend to administer booster doses to healthcare workers and people aged 50 and over.
With exactly two weeks to Christmas Day, political leaders and health officials have expressed concern about the trajectory of the omicron variant of coronavirus.
From next Friday until early in the New Year, an average of 45,000 arriving or departing passengers are expected each day in Dublin Airport.
Many of the Christmas travellers will be arriving from Britain. Yesterday, health officials in the UK, said daily Covid-19 cases had reached their highest level in almost a year.