The acting chief medical officer, Dr Ronan Glynn, is appealing to people nationwide to reduce their number of contacts this week.
He made his comments after 430 new cases of COVID-19 were confirmed on Sunday evening. This brings the total number of cases here to 34,990.
Of the 430 cases, 212 were in Dublin, 54 in Cork, 23 in Donegal and 23 in Galway.
Almost three-quarters of these cases occurred in people under the age of 45.
"I am asking every household across the country to sit together and make a plan to reduce the number of people you meet this week.
"We have absolutely no room for complacency. If every person, family, workplace and organisation does not play their part, the situation will continue to deteriorate," Dr Glynn insisted.
He also reminded people in Dublin and Donegal, who are at level 3 of the Government's five-level COVID plan, to work from home unless it is essential to attend in person.
"For people living in these and all other counties, assume that COVID-19 is circulating in your community and act accordingly," he added.
There are currently 108 confirmed cases of COVID-19 in hospitals nationwide,17 of which are in ICU.
For more information on the restrictions in place in your county, click here.
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