The ransomware attack that crippled crucial NHS systems across the UK and continues to cause disruption could have easily been contained, according to NHS Digital. The body, which oversees data and IT infrastructure across the NHS, said hospitals and other arms of the service had ample time to upgrade their systems. The 'WannaCry' malware variant used a Windows exploit Microsoft patched in mid-March this year. At the end of April, NHS Digital notified staff and "more than 10,000 security and IT professionals," pointing them to a patch that would "protect their systems." It seems this advisory fell on some deaf ears, which explains why only certain NHS Trusts were affected.