"systems hosting patient records"
A very careful phrase that.
Systems hosting the records are accessed over the network that was broken by worm infestation, using desktop computers which are, surely, Windows PCs of which some were infected by that worm.
The management of the NHS often criticise doctors for not being as open and forthright about what happens when something goes wrong as would be ideal, but the particular ones quoted don't impress me as showing an example.
Anonymous? You might very well think that.