The Department of Health has confirmed 365 more positive cases of Covid-19 in the Republic.
There are currently 51 people in hospitals with the disease, including 14 in intensive care.
The chief medical officer, Dr Tony Holohan, said: “In excess of 70 per cent of all cases are now accounted for by the Delta variant.
“While this variant continues to present a threat, those of us who are fully vaccinated can have confidence in their vaccine and should feel comfortable meeting with other fully vaccinated people in all settings.
“Unfortunately, the Delta variant continues to present a risk to those of us who are unvaccinated or waiting for a second dose of vaccine – we need to continue to follow the public health advice, manage you contacts, avoid crowds, wear a mask, wash your hands and most importantly get your Covid-19 vaccine when it is offered to you.”
Meanwhile, a further 420 positive cases of Covid have been reported in the North.
There were no deaths reported in the region over the past 24 hours.
On Monday morning there were 32 Covid positive patients in hospital in Northern Ireland, of whom four were in intensive care.
