"T-Virus (Perry)"@en . . "The T-virus was a mutagenic virus engineered by the Umbrella Corporation. It was engineered by Drs. Helen Black and James Trenton Darius. It was used as a marketable bio-weapon. It is known to be able to infect people as an airborne virus at at least some point in its lifetime."@en . . . . . . . . "The T-virus was a mutagenic virus engineered by the Umbrella Corporation. It was engineered by Drs. Helen Black and James Trenton Darius. It was used as a marketable bio-weapon. It is known to be able to infect people as an airborne virus at at least some point in its lifetime."@en . . .