The Department of Health has confirmed 4,620 new cases of Covid-19. The number of people in hospital with coronavirus is 571, down 27 since yesterday.
Of these, 118 are in intensive care, a decrease of eight. There were 2,004 new infections and nine deaths reported in Northern Ireland.
According to the Chief Medical Officer, Ireland's Covid-19 situation remains "vulnerable" to a further deterioration. Dr Tony Holohan said that factors - including levels of social contact "over the festive period" - will determine the number of cases over the next few weeks and months.
It comes as the World Health Organization classified a new Covid-19 mutation as a "variant of concern". Originating in southern Africa, it has been renamed Omicron.