Around 40 NHS organisations are thought to have been affected by the WannaCry bug that attacked computers in almost 100 countries on Friday.
Computers in hospitals were hit causing ambulances to be diverted, patient documents became unavailable in England and Scotland, and operations were cancelled.
The first WannaCry infection took place at 8.24am on 12 May; at least 200,000 more computers in hospitals, oil companies, banks and other organisations were affected, the Financial Times reported.
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