There have been 11,835 cases associated with clusters, and nearly a third of the national total, 8,208 cases have been among healthcare workers.
Chief Medical Officer Dr Tony Holohan, speaking at yesterday's press briefing where no deaths and 24 new cases of the virus were announced, said there had been a worrying rise in infections- many of which are related to travel from overseas.
That brought the total death toll in the country of 4.9 million since the start of the pandemic to 1,734.
Nationally, there have been no new deaths reported to the Health Protection Surveillance Centre today.
"We are starting to see a worrying trend, with the number of reported cases increasing, and some new clusters.
I can not emphasise enough how important it is to remain informed, keep a 2m distance from others and follow the public health advice on hand washing, cough and sneeze hygiene, and wearing face coverings". Many countries around the world are still experiencing high and increasing levels of this disease.
He said: "This is now a real concern and a worrying trend at a time when many people are reconnecting with friends and loved ones and may be gathering in larger groups. Wear a face covering, know the symptoms of COVID-19 and contact your GP straight away if you feel unwell".
Siobhán Killeen, Dublin GAA footballer said: "The aftereffects of this disease are very serious, even for those who are fit and healthy".
"Since then, there have been 10 million cases and 500,000 deaths reported worldwide".
Phase 3 has led to the reopening of pubs, gyms, barbers, and a number of other establishments that have been closed for over three months.
Main image: Dr Tony Holohan, Chief Medical Officer, and Dr Alan Smith, Deputy Chief Medical Officer, at the Department of Health briefing on COVID-19.