Regardless of the truth or falsity of it, governments will certainly exploit it to start issuing DUVs and pull people over for nothing more than to "check on their wellbeing". Never let a great crisis go to waste, right? The crises they exploit don't have to be true. They only have to be believed. Truth is whatever you can convince people of. Welcome to PostModernism.

They'll also probably try to outlaw driving all together, in order to further centralize the transportation system. Transportation is one of the last remaining frontiers of hyper-centralization. There is lots of evidence they are already trying to outlaw driving, and stories about "vaccidents" would be a great weapon to add to their arsenal. Everything is about centralized control of the human species.