James Marcus continued the year-long project that would become the t-Virus. However, his work eventually leads to a breakthrough becoming the catalyst that gives the virus its now infamous name. When infected with Marcus' version of the virus, the host suffers violent symptoms, including increased aggression and memory loss.
However, its most volatile symptom is necrosis of the flesh that begins as an itch and ends with the host taking off chunks of their own skin. Ultimately, Marcus successfully creates the franchise's zombie virus. William Birkin, takes the research one step further after stealing it. Melding the disease with the Ebola Virus, Birkin successfully makes it highly contagious while ensuring the survival of the zombified hosts.
As a result, the t-Virus underwent even more experiments to compensate for the ten percent that could not be infected. But Not Bloodborne.
These effects, combined with the painful symptoms of the infection, induce a psychotic rage, persistent hunger, and increased aggressiveness in those infected. Should the human host be dead at the time of infection, only enough energy is produced to power the lower brain functions. These functions are responsible for the most primal instincts, such as walking and eating.
In either case, their late-stage appearance and behaviour are characteristics of their name-sake, a zombie.
Should a late-stage human host be rendered unconscious, the body will lay in a dormant phase appearing to be dead. In actuality the host is rapidly mutating due to the T-virus becoming hyperactive. Within the time frame of an hour, the decayed skeletal and muscular system is reconstructed into a stronger and more durable form.
Development can be seen of sharp canine teeth and razor claws, fresh blood seeps into remaining skin giving it a reddish hue, advances in decomposition, and intact eyes become a bright white.
To awaken, the brain must be jolted back to consciousness with a slight but important increase in intelligence, and large increase in agility and aggressiveness. As a consequence of this rapid mutation, cellular breakdown hits a critical point where the host cannot regenerate properly and can be killed permanently. Depending upon the strain, the V-ACT may have different results. In the strain released in Raccoon City, most V-Acts usually resulted in creatures named by RPD staff as " Lickers " which are completely blind and use their hearing to detect prey.
At which point, they use their long tongues to strangle, impale, or decapitate their prey. At close quarters they also have sharp claws to slash their prey. Lickers may eventually evolve into a more advanced stage with larger claws. Lickers also have exposed brains which serve as a weak point. Only one specimen of this creature is known to exist.
What is actually is, is unknown. If it is a zombie partially evolved into a Licker, it would account for why its unable to spear prey with its tongue. It's only capable of grabbing its prey and using its tongue as a whip. Initially developed by Umbrella Pharmaceuticals in the late s, the primary goal of the "t-Virus Project" was to effectively eliminate the need for a large-scale conventional army and generate revenue to go to their eugenics program, the Wesker Project.
By , development moved from creating a lethal, highly-contagious virus to one that would mutate hosts to become physically stronger and remain alive despite organ failures and severe brain damage, the latter leading to murderous aggression and an obsessive hunger to the state of cannibalism. In the mids, the t-Virus Project focused on creating intelligent bio-weapons, most famously the Tyrants.
Independently developed mutagens such as t-Abyss were developed thanks to this. From the Progenitor Virus' discovery in December , the ultimate goal of Dr.
Oswell E. Spencer and his colleagues Dr. Edward Ashford and Dr. James Marcus was the birthing of a new age of eugenics with mutagenic viruses improving the human race. To fund this program, dubbed the Wesker Project, it was agreed that strains of the virus should be engineered as a military product, leading to the creation of Umbrella Pharmaceuticals as a front for this research.
Research on Progenitor strains was conducted simultaneously in different laboratories, with Ashford, Marcus and Spencer all engaging in independent research. Spencer's team developed their t-Virus prototype at the Arklay Laboratory, where they had already undergone testing of their "Type A" and "Type B" Progenitor strains.
Little is known of Spencer's project, though it would appear Spencer was disappointed in its progress and ordered research data be stolen from his counterparts. Work on this virus was completely abandoned by Ashford performed research on his t-Virus prototype at his family's stately home in Europe. In , Spencer orchestrated an outbreak at the lab, resulting in Ashford dying from infection. Work on t-Virus was put on hold until the s, when Ashford's cousin Alexia Ashford took charge of the project.
The fruit of her labours would ultimately be t-Veronica Virus , created through splicing Veronica Virus into the Progenitor genome. Alexia would go into hiding in , leading to the misconception that her project was a failure and she had died just as Edward had. James Marcus' research reached a breakthrough on 13 January , which warranted the official coining of the name "t-Virus" to divorce the strain from Progenitor Virus.
Using the virus on humans saw a very different response compared with Progenitor infection, rather than dying the infected instead became aggressive, were found to have cannibalistic impulses, lost intelligence and suffered from significant necrosis. In , samples and research data were stolen by Dr. William Birkin. Immediately upon his transfer in the Summer of , Birkin began drawing up plans to modify the virus further, splicing RNA from Ebola into the t-Virus' genome.
This, he believed, would make the virus highly contagious while keeping most victims alive as Zombies. Starting around , development of the t-Virus entered Phase 3 with the intention of creating reliable, intelligent B. Its counterpart Tyrant Project had at the time determined it was statistically improbable for any one individual to possess by chance the genetic characteristics to be compatible with the t-Virus strains presently available. This new virus was also discovered in to force a second set of mutations in Zombies, resulting in creatures such as Crimson Heads and Lickers.
New viral strains were developed towards the end of Umbrella's existence and the years following.
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