The Department of Health has been notified of one further death of a person with Covid-19 and three additional confirmed cases.
There has now been a total of 1,735 Covid-19 related deaths in Ireland, with a total of 25,439 confirmed cases.
The Health Service Executive is working to identify any contacts the patients may have had to provide them with information and advice to prevent further spread.
Yesterday, Chief Medical Officer Dr Tony Holohan said the number of new cases of Covid-19 in younger people was now a real concern and a worrying trend.
Dr Holohan said that of the 23 new cases reported yesterday, ten - or 43% - were in people aged under 35. A further eight cases were in people aged between 35-54.
He said this was now "a real concern and a worrying trend" at a time, he said, when many people were reconnecting with loved ones, and may be gathering in larger groups.
In Northern Ireland, one more person has died as a result of coronavirus, taking the official Department of Health death toll there to 550.
There is one new confirmed case of Covid-19, taking the total to 5,751.
For the second consecutive day, there are no coronavirus patients being treated in ICU in the North.
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For Covid-19, the World Health Organization says that data to date suggests that 80% of infections are mild or asymptomatic.
15% are severe infection, requiring oxygen and 5% are critical, requiring ventilation.