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Signage is seen outside The Royal London Hospital in London on May 14, 2017. The unprecedented global cyberattack has hit more than 200,000 victims in scores of countries, Europol said on May 14, 2017, warning that the situation could escalate when people return to work. In Britain, the attack disrupted care at National Health Service facilities, including The Royal London Hospital, part of the largest NHS Trust in England. / AFP PHOTO / Niklas HALLE'N (Photo credit should read NIKLAS HALLE'N/AFP/Getty Images)

Signage is seen outside The Royal London Hospital in London on May 14, 2017.
The unprecedented global cyberattack has hit more than 200,000 victims in scores of countries, Europol said on May 14, 2017, warning that the situation could escalate when people return to work. In Britain, the attack disrupted care at National Health Service facilities, including The Royal London Hospital, part of the largest NHS Trust in England.   / AFP PHOTO / Niklas HALLE'N        (Photo credit should read NIKLAS HALLE'N/AFP/Getty Images)