If you are following the news, by now you might be aware that a security researcher has activated a "Kill Switch" to stop WannaCry ransomware from spreading further, but it's not over, criminals are now launching attacks using WannaCry 2.0 that do not have 'kill-switch' domain connect function.
WannaCry infections are raising even hours after kill-switch was triggered, from 100,000 to 213,000