First victims of HSE hack will find out today

'We sincerely regret the impact this cyber-attack has had on our health service, our patients, and our teams nationwide', said HSE national director of operation performances, Joe Ryan

It could take until April next year before all 113,000 people whose HSE data was illegally accessed during the cyberattack last year are contacted, the HSE said.

The first letters were sent out Tuesday, including 94,800 patients and 18,200 staff. Some of the copied staff documentation included travel expenses with financial details.