Zombies

Zombies are members of society infected with the Green Viscidation. Zombies can spread disease to people via breathing, which is why most people use gas masks or other types of facial protection. Unlike most diseases, a lot of symptoms of the GV disease are very apparent. There are four stages a zombie goes through. Unlike most fictional zombies, the ones in The Death of Mankind are mentally stable. In fact, they're similar to humans, except they have slight discolorations in the skin, bruises, and their wounds don't heal. Zombies have naturally stronger bodies, meaning that in order to kill one you would need to destroy a vital organ. They don't need to feast, but do need to drink. Many zombies are independent and are members of factions, as the only grouping zombies have together are the disease they all have in common.
== Carriers ==
Outcasted by humans, but accepted by early-stage zombies. They are normal humans, but they just have the unlucky life of being a disease carrier. Many carriers are immune to the disease, however those that are not go through the stages of an infected zombie.
== Infected ==
The lowest level of infected, infected zombies are still sentient and smart like other humans. On occasion, infected zombies are let into highly-populated areas by accident, however most zombies roam the American Terra Nullius by themselves or part of other zombie factions.
== Forces ==
Forces are zombies that have had the Green Viscidation mutate their body through lack of treatment. Although sentient, they are extremely aggressive towards everyone, including other zombies. These are your typical cannibalistic zombies seen in modern movies. While much stronger, these zombies lack mental stability and human compassion, often times going through to destroy human camps and kill other people.
== Immune ==
These are the extremely lucky people who are immune to the Green Viscidation. They are allowed anywhere, and are usually medics. They aren't marked, but usually seen without gasmasks outside of non-infected cities.