Forget an actual zombie apocalypse happening. We've already got hordes of people who's brains have been enveloped and consumed by a device always attached to their hand at all times. Everywhere you look people are constantly checking their phones or gazing down into them mindlessly as though they're delving into the deepest secrets of the universe. Have the ruined a generation? Or is there still?
https://www.theatlantic.com/magazine/archive/2017/09/has-the-smartphone-destroyed-a-generation/534198/