Members of the public are being urged to protect themselves and those most vulnerable as flu cases continue to rise in the community.
Hospitals in the north west and west have been dealing with high attendances and high admissions over the past number of days.
High numbers are putting additional pressure on hospital emergency departments.
In a statement, the HSE say flu, in particular, is having a significant impact.
Nationally almost 900 people are in hospitals across the country being treated for flu, a rise of 300 since last week.
Those attending hospital are asked to continue practicing infection prevention measures such as handwashing and covering coughs and sneezes.
Visiting restrictions are also in place in wards impacted by flu and RSV and the public are being asked to cooperate with staff where hospital visiting restrictions are in place.
Anyone with breathing difficulties or chest pain is being urged to attend the emergency department for treatment or call 112/999 in an emergency, and patients with non-life-threatening conditions should seek healthcare in the community.
While additional Daytime GP expanded clinics are available from some practices, and patients should check if their GP is participating in this arrangement.
