“Sixteen National Health Service (NHS) organizations in the UK have been hit, and some of those hospitals have canceled outpatient appointments and told people to avoid emergency departments if possible. Spanish telecom company Telefónica was also hit with the ransomware.
Spanish authorities confirmed the ransomware is spreading through the vulnerability, called ‘EternalBlue,’ and advised people to patch.”
Source: Massive ransomware attack hits 99 countries – May. 12, 2017