No one could prevent another ‘WannaCry-style’ attack, says DHS official

[BiestaGetse]

Maybe not, but you can certainly mitigate it's effecte by:
Having regular tested, known good backups of all data.
be able to re-image affected computers over your intranet
And, to prevent getting infected in the first place (These attacks typically start with a successful (spear) phishing campaign or a compromised poular website.)