The attack is described as extensive by spokespersons at Irish healthcare.

However, bookings related to covid-19 vaccination have not been affected.

- We have taken the preventive measure to shut down all our IT systems to protect them from this attack and to be able to tackle the problem with the help of our security experts, says the head of health care.

The attack should be of the type that threatens to delete the files on the computer unless a sum of money is paid out.