The Taoiseach says hundreds of experts are working to track down those responsible for the massive cyber attack on the HSE.
Hospital's radiology, diagnostics and therapeutic services continue to badly impacted by the breach.
Patients with non-urgent care needs are being urged to consider injury units and GP Out of Hours for assessment.
Hackers are also said to have begun leaking some people's private health information online.
Barrister, Morgan Shelley, these types of criminals are generally based outside the EU, which makes tracking them down difficult.
"If someone is outside the European Union it's a lot more complicated to extradite them back to Ireland, and the process can take a long time.
"The real difficulty is identifying the people's nd then creating a situation where they're arrested in their own country.
"And very often because they choose countries where the rule of law is not strong, they can evade justice."
