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Prime universe
(Capcom's primary storyline)

The t-Veronica Virus is a strain of the Progenitor virus created by Dr. Alexia Ashford, who sought to create a variant of the t-Virus that does not impair cognitive function. Under the correct conditions, it allows the host to retain all of their brain functions. The virus is named after Veronica Ashford, the matriarch of the Ashford family. Since her passing, data from the t-Veronica virus was later used by Dr. Carla Radames, a high ranking member of The Family's bioweapons program, to create the "T-02", a new variant of the t-Veronica virus which erased the need for long incubation periods the t-Veronica viruses needed to maintain the host's intelligence. This new "T-02" was used in tandem with samples of the G-Virus to develop the more powerful C-Virus.


Initial research[]

The basis of t-Veronica research came from the discovery of a retrovirus that existed within the genome of some ant queens. Alexia, who mistook the eusocial nature of an ant colony for one with complete adoration for their "queen", likened it to her own megalomaniacal personality. She began considering the possibility of merging the genome of this virus with that of the Progenitor virus,[1] and plant genes were also added into the virus's makeup.[2]

The first step in human testing came in 1982, when Alexia and Alfred infected their "father," Alexander Ashford, with the virus.[3] As he had not been adequately prepared beforehand, he failed as an experiment.[1][4] Alexander was imprisoned within the Antarctic Base, terrifying the facility's workers with his inhuman growls and earning him the name "Nosferatu".[5] Soon after her father's degenerative mutation, Alexia christened the virus "t-Veronica"[1] in honor of her cell-donor.

It was soon after this that Alexia decided to experiment on herself. In order to prevent the degeneration that Alexander had faced, Alexia concluded that going into a cryogenic coma for fifteen years should allow her to adapt to the virus.[4]


At one point this year, Albert Wesker intercepted a rumor regarding the existence of this virus. Expecting it to be somewhere in Alfred's Rockfort Island base, he and the H.C.F. attacked the island, leading to a biological outbreak of the t-Virus. Eventually, it was discovered by Wesker that Alexia was, in fact, alive at the Antarctic Base; he concluded, correctly, that he would find the virus there. He left via a submarine on his way to the base, situated in the Ross Ice Shelf.

Shortly after Alexia's revival, she proceeded to experiment on Steve Burnside. While he didn't have the benefit of a fifteen-year period of hibernation, Steve managed to counter the virus not long into his mutations, as he regained his sanity - he died soon due to his injuries. Later on, Alexia used the strain of the virus in her body to mutate into a powerful being during her battle against Albert Wesker.

Alexia herself mutated further into a queen ant monster and was killed by Chris Redfield with the experimental "Linear Launcher". With nothing surviving the ensuing destabilization and explosion of her body, the capture force instead took Steve's body for experimentation.


In order to impress Derek C. SimmonsCarla Radames acquired a sample of the t-Veronica virus and began experimenting with it in hopes of creating a "perfect virus," despite initially considering t-Veronica as "obsolete." By removing the genetic code of the virus that caused sudden mutations and combining it with parts of the Progenitor virus, Carla developed a new variant of the t-Veronica virus called "T-02."

Unlike t-Veronica, T-02 did not cause its hosts to experience mental degeneration, eliminating the need for long incubation periods (as with Alexia) or constant organ transplants (as Javier did for Manuela) to maintain virus stability. This significantly increased the potency and viability of the virus as a bioweapon.

Later, Carla combined T-02 with the G-Virus variant found in Sherry Birkin's body. The resulting pathogen, the C-Virus, combined the best elements of t-Veronica and G, transforming its victims into intelligent and extremely dangerous creatures.

South America 2002[]

South American drug lord Javier Hidalgo eventually stopped buying B.O.W.s from Umbrella Corporation, who had started to inflate their bio-weapons prices due to the Raccoon Trials. The t-Virus variant he had infected his wife, Hilda, with to treat her illness had begun to backfire, unfortunately transforming her into a grotesque aquatic creature.

When his daughter, Manuela, became ill, Wesker began doing business with him, selling him samples of t-Veronica at a much more reasonable price. Javier injected the virus into her while searching for ways to prevent the same degeneration that had taken Hilda. Javier later came to the conclusion that a means of countering the virus' control over the body was to constantly replace the infected tissue until the body was able to safely assimilate the virus. Thus, Javier arranged for Manuela to undergo a series of organ transplants for the next fifteen years - this way, she would remain in control of her body and continue to live a normal life with her father. To facilitate this grand plan, Javier's crime syndicate, the Sacred Snakes, began kidnapping young women of Manuela's age to be used in forced organ donation.

When US Government agent Leon S. Kennedy and USSOCOM member Jack Krauser began investigating the region in search of the Umbrella researcher who had been selling bio-weapons to Javier, they discovered Manuela. Being led to Javier's mansion, they discovered the organ donors and Hilda. Soon after, Javier infected himself with the virus by merging with the V-Complex in order to kill Leon and Krauser. Later on, Manuela realized the psychological aspect of t-Veronica: if she gave in, she would no longer feel pain; if she resisted, she would die human. She chose to die human to save Leon, throwing her combustible blood at Javier until he eventually died. Although weakened from blood loss, she nonetheless survived as an ordinary human.

The Family and Neo-Umbrella[]

Carla Radames used the T-Veronica virus as one of the base components of her C-virus, along with the G-Virus. The subjects did not experience flammable blood, but would eventually expire in flames due to their body heat constantly rising in response to the healing process. The enhanced version of the virus worked similarly to the mutations of Veronica, Javier, and Hilda.

Virus traits[]

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Flammable blood was a mutation shared by Manuela and Alexia.

The t-Veronica virus was not distributed on a wide scale like other viruses and parasites in the series, but it appears to operate similarly to its predecessors, the Progenitor Virus and the t-Virus. In addition to granting the host's host who have successfully bonded with it superhuman physical abilities, the most notable differences include a tendency for infected individuals to manifest arthropod traits in their mutations, such as hard carapaces or insectoid limbs. The blood of a t-Veronica host often changes into a chemical that spontaneously combusts on contact with oxygen, allowing the host to weaponize their own blood as a projectile.

Like the t-Virus, the t-Veronica virus has a tendency to cause severe mental degradation in its hosts. Unlike the t-Virus, successful fusion with the t-Veronica virus does not require the presence of certain genes or hormones in its host. Instead, the stabilizing factor appears to be the rate at which the virus is allowed to spread within the body. In order to perfectly coexist with the t-Veronica virus, the host must live with it for a number of years, allowing the virus to adapt to their body. Alexia Ashford achieved this by entering a state of cryogenic stasis, causing the virus' infection rate to slow to a crawl, while Javier Hidalgo planned to regularly replace Manuela's infected organs with fresh transplants (thereby retarding the virus' spread by forcing it to constantly "re-infect" her organs). As with many variants of the Progenitor virus, the mutations induced by the t-Veronica virus are largely dependent on the mindset of its host.

Notably, two people infected by t-Veronica (Manuela and Steve) have been able to counter their mutations and regain control of their bodies through willpower alone. A more subtle example was Manuela's mother, Hilda, who regained some part of her humanity at the sight of Manuela and was kept at peace when she sang a lullaby that Hilda sang to her as a child. Unfortunately, when Manuela was too weak to sing the song, the monstrous personality regained control. Javier, like Alexia, was also able to control himself when mutated by the virus. However, due to him not having a preparation as Alexia did, he almost lost his consciousness. By the time Javier regained control over himself, he was only able to beg Leon and Krauser to kill him.

According to the V Complex's archive entry in The Darkside Chronicles, the virus' activity was also dependent on the outside temperature. The frigid temperatures of the Antarctic meant that the virus could not travel as easily, and the virus could not infect its surroundings as easily. The tropical and humid climate of South America, however, caused the virus to reach enormous proportions, potentially threatening entire ecosystems.

Known Infectees[]


  1. 1.0 1.1 1.2 Capcom Production Studio 4. Resident Evil - CODE: Veronica. (Capcom Co., Ltd.). File: Queen Ant Report.
  2. BSAA Remote Desktop, t-Veronica report
  3. Capcom. Resident Evil 5. (Capcom Co., Ltd.). File: History of RESIDENT EVIL.
  4. 4.0 4.1 Capcom Production Studio 4. Resident Evil - CODE: Veronica. (Capcom Co., Ltd.). File: Alfred's Diary.
  5. Capcom Production Studio 4. Resident Evil - CODE: Veronica. (Capcom Co., Ltd.). File: Worker's Diary.