Do I need to worry about ransomware?

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After 48 medical facilities in the United Kingdom fell prey to the WannaCry ransomware attack, several news outlets analyzed how such a thing could happen. The attack targeted several business, including hospitals, and locked down computer systems, saying they'd only be unlocked when a ransom was paid. The attack forced hospitals to relocate or turn away some patients coming in for treatment because they couldn't access patient records.

According to CNN, the reason so many hospitals were vulnerabl...