Latest trolley figures show 14 people are waiting on a bed in the midlands.
The Irish Nurses and Midwives Organisation says overcrowding in hospitals could cause a risk of cross-infection from Covid-19.
Latest trolley figures from the IMNO show 14 people are waiting on a bed in the midlands, all of which are in the Regional Hospital Mullingar.
That's the second highest figure in the country after Limerick University Hospital.
The union and Irish Association for Emergency Medicine warn that the "problems of the past" may re-emerge as non-Covid treatments are ramped up.
INMO general secretary, Phil Ni Sheaghdha, is calling on the government to keep using private hospitals for public patients: