the 的指代问题

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.

译文：

T病毒抗性实验

（628和629号实验体）

我们将G病毒注入628号实验体，该实验体曾对T病毒产生轻微抗性。然后将T病毒注入与628号关系亲密的629号实验体。628号产生反抗迹象，但在24分钟后被植入胚胎。T病毒抗性无助于阻止G病毒导致的心智衰退。