There is still a long way to go before most HSE services are restored, according to the executive.
Chemotherapy services are now operating at between 80% and 100% capacity.
However, there is still major disruption to radiotherapy.
This afternoon, officials from the HSE insisted that progress is being made to get services back up and running.
Despite this, a decryption key provided by hackers isn't unlocking some systems.
HSE CEO Paul Reid says the hack continues to cause problems across the health service:
"The risk to our HSright now are carried across all aspect of healthcare."
"In any analysis or any judgment of what the risks are in the health system right now - they are extremely red hot."