The Zombies, or "Ragers", as they are called, have swarmed all over and throughout NYC and the surrounding countryside and neighborhoods, and have slaughtered a mass portion of the citizens of New York and canabalized a great deal many of them.
They are ferocious, vindictive, determined, territorial, and without empathy and humanity.
They are not undead, nor living dead, but are merely humans who have been consumed by a highly mutated and evolved form of
VCJD, a brain disease that is a evolution from "Mad Cow Disease", which is virus that infects cattle and causes it to become violent, incoherent, and eventually handicapped followed by death.
This mutated strain of VCJD seems to have far greater influence and control over it's human hosts and drives them utterly psychotic and primal, as it eats away at their brain.
It slowly disables their sense of intelligence, followed by their passiveness and humanity, doll owed by their very personality and identity.
Eventually, it shuts down their motor skills and function ability as well, and will soon after kill them, or at least that is, depending on how far evolved it is compared to it's bovine born precursor.
The Ragers themselves are totally infected and overtaken by the virus.They have no sense of reason nor humanity or empathy, and have barely any intelligence or thinking power to boot.They are merely savage, primal, aggressive beasts trapped in a human body.
They have a high pain tolerance, so while severe wounds may kill them, it could take some time.
While they are still human and can be killed in any way that a normal human can be, their high pain tolerance makes non-fatal wounds and non-fatal attacks risky.
True enough, they can bleed out or die from organ or critical tissue wounds, but they won't feel a thing until they are virtually dead.
They are also not at all sluggish or weak.
While not enhanced or strengthened by the virus, the strength, speed, and overall physical capabilities they had as "normal humans" is still with them.
Meaning that they are more than capable of sprinting, jumping, jogging, climbing, ect.
As for sounds and noise they make little to no noise, other than grunts, moans, groans, and snarls.
They do not roar or howl or screech.
They are still human, even if they don't look it.