Peter and Olivia stare silently at each other for about eight hours, and then Olivia notices, behind them, the receptionist standing there looking at them. She doesn't say anything, then eventually turns and walks away. "She's out. The receptionist," says Olivia, and she and Peter get up to follow her. They lose her in the office's halls and corridors, so Olivia and Peter split up, with Peter winding up in the reception area, and all of a sudden the receptionist is screaming in Peter's face, and she just came out of nowhere so I guess part of the virus's "personality" is that it turns you into a ninja, and Peter, startled, slips and falls in VandenKemp's blood. Meanwhile, the receptionist runs off down the hall and launches herself right through a window and plummets 16 storeys onto the windshield of a CDC van.
Up in the office, Olivia arrives in the lobby and is stunned to see Peter with VandenKemp's blood on him. She says his name, and they look at each other some more, and then he runs off while Olivia answers her phone. It's Broyles, understandably wanting to know why people are hurling themselves out of office windows. In the background, CDC guys hose down the corpse and van with some kind of foamy white material.
In the bathroom, Peter frantically scrubs at the blood on his arms, and Olivia comes in and tells him to be careful. Peter looks thoughtful for a moment, and looks at Olivia, who looks like she's doing her best to appear optimistic.
But Peter has other ideas, because the next thing Olivia knows, he's rifling through VandenKemps pockets, much to her horror. The way Peter sees it: "I got his blood on me. If I wasn't infected before, I probably am now." She says this is insane, and he says, "They're down here, and we're up here. And they're not sending anybody else up. This is our last chance to figure out whatever it was that he came here to try and sell." He finally comes up with what he was looking for in the dead man's pockets: rental car keys. As Peter says: "Never take anything into a negotiation that can land you in jail. Always leave it in neutral territory." Yeah, great deduction, Peter, although I'd like to point out that I think A) it's odd that the FBI hasn't managed to consider that a guy flying in from Dubai might need a rental car, and B) if they didn't maybe you should have just called them and suggested it, because once they know what car to look for, they're not going to actually need the keys, so you didn't need to expose yourself again.