A report from the parliamentary National Audit Office into the WannaCry ransomware attack that brought down significant parts of Britain’s National Health Service in May 2017 has predictably been reported as blaming NHS trusts and smaller organisations within the care system for failing to ensure that appropriate computer security measures such as software updates and secure firewalls were in place. But the central NHS IT organisation, NHS Digital, provided security alerts and the correct patches that would have protected vulnerable systems well before WannaCry hit.

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