The Overgrowth

Item #:Undetermined
Object Class:Undetermined
Special Containment Procedures: "The Overgrowth" must be contained within Site-XX, any other of the more intelligent instances of "The Overgrowth" may be allowed to transfer to other sites. Tree instances of "The Overgrowth" must remain in Site-XX. Trees must be allowed exposure to sunlight and water. The intelligent instances must be allowed some exposure to water.
Description: It is unknown whether or not The Overgrowth should be considered a fungus or a plant. This "disease" has features from both types, so its classification is still up for debate. Traits of The Overgrowth include:
90% infectiousness.
100% lethality.
Transmission through the air, exposed cuts, and all bodily fluids including water.
Symptoms of the infection with exposure to "The Overgrowth" no more than a week after exposure include:
Mutations through the skin, possibly some body parts, turning the entire body into "living" wood.
A Coma in the first 72 hours of exposure
Extreme paralysis, often limiting overall body movement of host.
Metabolism may decrease drastically or be entirely eliminated, allowing the host to survive virtually forever as long as there is water.
Certain mosses and grass replacing hairs on the host.
Usually, after exposure in the later stages, the host will turn aggressive to any living thing it detects. But certain individuals have been able to retain past knowledge and memories, still able to think and act normal, but with a drastic change in appearance and power.
Addendum: SCP-500 has shown no signs in being able to entirely "cure" the disease, but will enable the infected human hosts to act like their usual self before the infection.