Dromaeosaurid Mutagen

Dromaeosaurid Mutagen (Codenamed DM-10 for the current strain) is a deadly prehistoric disease carried by the Utahraptor Xipetotec and his pack of Citrinitas Utahraptors.

Characteristics
Dromaeosaurid Mutagen is an unstable virus that mutates very fast. As a result, it can jump the species barrier very quickly. The virus can infect reptiles, birds and mammals, including humans. Due to their advanced immune systems, dinosaurs are largely immune to the virus, instead acting as carriers. The current and only known dinosaurs that have been confirmed to carry the virus are Utahraptors, suggesting the disease evolved with them. Roughly 1/3 of humans are naturally immune to the virus, suggesting some humans have immune systems that recognize the disease and prevent it from taking hold.

Symptoms
Dromaeosaurid Mutagen is akin to a nerve agent in regards to how it affects the body. The virus takes weeks to take hold, then moves into its first set of symptoms. This is marked by projectile vomiting and then followed by diarrhea. After a week of both, paralysis sets in. Delirium follows the paralysis a few days later. Painful, pus-filled blisters then erupt across the whole of the body. Death follows shortly after. However, it is notable that some survive the virus' progress, though the survival rate nor the death rate are never specified.

The Hunting of Stalker Force
During their hunt for Sobek and his colony, Andrei Wynn brought Xavier Wise and the rest of Stalker Force to the location of Research Station 2 (USSR Res-Stat 2), in the hopes of locating Sobek's nest. During their mission, Andrei informed the team of the virus, telling them of how some of his original research team died from it along with some animal populations while others, himself included, survived due to their natural immunity. Andrei wanted to ensure General Amadeus Jericho didn't know of the virus due to his fear that Jericho would try to weaponize the virus, like how he feared the Russian government might do the same. To that end, Andrei suggested the virus be left to become an international problem so as to ensure better and greater mobilization against it. During the ambush by Sobek and then the confrontation with the Yutyrannus, the research station and all evidence of the virus that might allow for its weaponization were destroyed when Stalker Force blew up the building with C-4 explosives.

Primitive War: Animus Infernal
Five years later, the virus had continued to spread with the migration of Xipetotec and his colony of Utahraptors from Vietnam to Angola. Stalker Force had followed the virus-carrying Utahraptors all that time, killing them and trying to eradicate the virus with them. By the time Stalker Force had located Xipetotec in Africa, the virus had mutated into a tenth strain since its initial discovery. In spite of Xipetotec's eventual death, the citrinitas Utahraptors that also carried the disease survived, allowing the virus to remain active.