( he hesitates, not having thought out this far what to say; that and a reluctance to talk about the subject at all draw the hesitation out into a pause. )

Project Chimera didn't really need people around; the scientists mainly did their work in the laboratories. But to do that, ( he starts to raise a hand and then drops it, shaking his head ) they had to collect samples to study there — like blood, for instance.

( and presumably what precisely they were doing going at his chest for the incuse will be easy to infer now. )