It's a file in the game Resident EVIL 2 remake.
T-Virus Resistance Experimentation
(Subjects 628, 639)
We administered G-Virus to subject 628, who had shown slight resistance to the T-Virus. The* virus was then introduced to subject 639, with whom 628 had a close relationship. 628 showed some signs of resistance, but had been implanted with an embryo after 24 minutes. T-Virus resistance does nothing to stop the mental deterioration caused by the G-Virus.
I have marked it with *. In the Chinese translation, the virus refers to the T virus, but I don't quite understand why.