Introduced in season three and created by Dr. Arnold Spivak, the Upir Virus, also known as LPS or LPS Cancer is a cancerous, parasitic, zombie-like infection designed to be useless on humans, but it will make Upirs to turn on their own race, making them feast on each other, while also making an
infected Upir unable to tolerate regular blood, causing them to vomit it back out.The parasitic tumor assimilates tissues and organs in the body after it winds itself around the host's brain and spinal cord, infecting the parts of the nervous system in charge of vision, hunger, reasoning, and self control, making it work for itself. This also means it is impossible for the infection, such as the one that killed Olivia, to be cut out through surgery. By its assimilation of the nervous and digestive system, it modifies the host behavior.
During this time, the tumor like parasite grows within the body of its host, residing primarily in the torso, nearest to the digestive system, developing its own nervous and digestive system, as well as gaining the limited ability to move inside the hosts. Despite the death of its host, the parasite itself can remain alive. There is some connection to science experiments that happened in Germany during the second world war.
Its first affects are black veins developing, bleeding sores forming on
the body, and signs of insanity, especially paranoia and memory disorders. After or as the mind deteriorates, the infected experience a somewhat corpse-like complection, a depraved, savage and somewhat sadistic personality, ossification of much of the flesh, heavy disfigurement and loss of fat and, lastly, a complete loss of human consciousness, leaving the infected a rabid animal relentlessly hunting other upirs. Before the infection causes ossification, the Upir can still speak and think, though they will be insane and blood thirsty regardless. The Upir physically becomes a walking corpse until their infection kills them. These Upir are also hyper sensitive to direct light due to the infection in their optic nerve. This causes them to always hunt at night and in the dark. After the infected has consumed others of its kind, its nature will compel it to consume itself, ensuring the species infected by the virus is completely terminated should any of them survive the infection.
Human Infection Edit
A variant of the parasite was made to infect and control humans, turning them into puppets and nearly mindless and emotionless shells of their former selves. Spivak created this to infect humans and remotely control them like drones. This parasite was slightly technological, as it had a built in speaker and other mechanisms, which could connect to the nerves, especial the eyes which they could use as camera's.