The HSE has rebooted 1,200 servers today in order to activate additional security updates designed to address the WannaCry ransomware virus.
The executive says any significant disruption to patient services is not anticipated and business continuity processes are in place to protect the delivery of patient care.
The HSE says there have been no reports today of any additional suspected cases of the ransomware attack and the executive is continuing to monitor the situation.
Whilst the Health Minister has called for a more joined up approach to cyber security.
The damage in Ireland was limited
Minister Simon Harris says the effects of such attacks in future could be devastating.