I just want to say that I'm excited about these recent developments.
While Sam is fighting the disease, Ace is going to be pretty agitated. This is well outside his realm of expertise, and waiting to see if the man he has just come to grips with as a "friend" fight for his life in that manner is going to make him feel pretty powerless.
Just to keep himself active, Ace is going to want to revisit the scene of the attack in the morning, while on a perimeter check with one or two others -- Chino will want to go too. I imagine that the corpses will be frozen solid by then, but Ace is also going to want to see if they're still invisible. If they are, how difficult would it be to get one back to camp? At some point he's going to want to feed Katsina, and as loathe as he'll be to leave Sam's side, he knows that they need to get the pic to DIMR, so he'll want to make plans to that effect, though he may lean toward holding back for a few days.