
Originally Posted by
RiverGhost
Rams were prisoners from the Insane Asylum, so therefore they already were in the straight jackets as humans. And their size, as well as the Thug size, I always just assumed they were big to begin with (even as humans), such as body builders. And the floaters were infected near the water--it takes a drowned body around 2-4 days (assuming somewhat warm water) to become bloated/float--so that makes sense especially since you don't find them until the city.
The suiciders were explained in the game by having been exposed to some toxic substance, that causes them to mutate and seek out living humans and explode upon contact.
I would assume the disease affects people differently, considering walkers act more typical of zombies (like in The Night of the Living Dead) and the infected act like those untypical zombies (never dead/just exposed to a 'rage' virus). On pure speculation, maybe the walkers are those infected after death--and the infected are those who were infected before death (or they move differently due to different injuries, the walkers being simply more roughed up and just unable to run).