Health officials have warned there are very few counties where the incident rate of Covid-19 is not rising.
Five additional deaths and 611 new cases have been confirmed this evening.
218 are in Dublin, 63 are in Cork, 60 are in Donegal, 35 are in Galway, 31 are in Kildare and the remaining 204 are located across 21 counties.
Speaking at the latest Covid-19 press briefing, Chair of the NPHET Modelling Advisory Group Professor Philip Nolan said the country has now entered a "phase of exponential growth."
"In terms of incidents by county, we have been watching this for some time, there are very few counties where incidents are not increasing."
He said, "there are no counties where the incidents is not of concern."
The Chief Medical Officer said he's also worried by the spread of Covid-19 since NPHET met on Sunday.
Dr Tony Holohan said "in respect of each of those key indicators that we considered on Sunday, we have seen further deterioration in each one of them over the course of recent days and we are deeply concerned about the changing path of this infection."
He added, "what I have to get across is the seriousness of the situation we are in as a country. We're really genuinely worried about the stage of the disease.
"We are now beginning to see exponential growth in not only the case numbers but now in many of the indicators that result from the impact of the disease".
At the briefing, Dr Holohan also confirmed the air had been cleared between him and the Tanaiste after he was criticised by him earlier in the week.