The HSE is warning patients to stay away from emergency departments if possible, as a number around the country are under "significant" pressure this week.
Yesterday, 483 patients were left waiting on trolleys, with a high number of covid-19 and flu cases attending at EDs.
Patients are asked to assess all other care options before attending, including using a local GP or injury unit for non-urgent medical needs.
The HSE's Chief Operations Officer, Damien McCallion, says they are putting plans in place to ensure everyone can receive the care they need.
