There's a "clear change" in the way Covid-19 is spreading, with younger people now accounting for the vast majority of cases in this country.
All of the 23 newly-confirmed cases last night were people under 45 years of age, with 15 under the age of 25.
The National Public Health Emergency Team says people need to take immediate care and caution.
Acting Chief Medical Officer, Dr. Ronan Glynn, warned that, if people do not behave with caution, we could soon find ourselves back in a situation we would be 'very concerned' about.
"If we try to go back to living and acting like we did last January, it is only a matter of time before we are facing a significant problem with this disease," he said.
"We have got cases in a number of locations around the country linked to clusters. That demands a huge amount of resources and if that replicates itself over the coming days and weeks, we will be back in a situation we would be very concerned about."
Dr Glynn said young people must be sensible if they are gathering this weekend.
"You can gather with six, ten, 20 friends, don’t social distance and all of you could be seemingly healthy but it only takes one person in that group to be spreading COVID," he said.
"All of the people in that group might be fine, perhaps no-one will get unduly sick - but that might not be the case for all of their families and all of their loved ones.
"So really, please, think twice."
Just a reminder...we are still living with a deadly virus. If you are younger, you are NOT immune. If it doesn't kill you, your transmission could cost the life of someone else. Let's all get our act together this weekend. #COVID19 @HSELive
— Paul Reid (@paulreiddublin) July 10, 2020
Waterford
There's no change in the number of coronavirus cases in Waterford.
The total number of confirmed cases since the outbreak began remains at 160.
Meanwhile University Hospital Waterford is continuing to treat two Covid positive patients.
A further two suspected cases were awaiting the results of testing last night - that's according to the HSE's Daily Operations Update
