The HSE is warning patients to expect 'widespread cancellations' of hospital appointments again next week.
Some computer systems have been restored after the cyber-attack almost 2 weeks ago, but most have not.
Emergency departments are still very busy due to the loss of IT equipment, while hospital, community and screening services are still affected.
The HSE's chief operations officer, Anne O'Connor, says the disruption will continue for a long time.
The Saolta Hospital Group in the West is cancelling about 20,000 appointments as a result of the ransomware attack.
Tony Canavan, chief executive of the Saolta Group which manages seven hospitals in the region including Mayo, Roscommon, Sligo and Galway University Hospitals, says a number of services are affected......