Status Updates From The Zombie Survival Guide: ...

Then again, any event causing a government as media-conscious as our own to clamp down merits close attention. The truth, no matter what it is, cannot be good.

Reminds me of when that big company spill chemicals into that neighborhood. There was a big press presence there. The company locked the area down tight. Some how drones couldn't fly over. Not safe ??? Something big was covered up there.

And the very next section answer my questions. 3 to 5 years seems quite long for something that has no way to repair itself or sense of pain or danger

Do the zombies rot? Does the infected brain keep the body from falling apart?

Look up somnambulists