User blog comment:Forgotten Madness/Do YOU Think Zombies such as the Necrosis, Wicker and Devastator (Both SAS 3 & 4) were Human/@comment-25461088-20141024033833

Because of these zombies as well as the computerized virus, I think that this virus was intended as a bio-weapon that turned the enemy into supercharged zombies, who then destroy everything and everyone in the vicinity, but the virus got loose.