I strongly believe the virus can even reanimate and morph recently deceased flesh that it's contained within (tieing into Egyptian themes). Once it takes full effect we'll start to see it can change almost anything in the form it's in. Mainly due to the Engineers' failed experiment to mix the Alien genetics with some of their other pets in an attempt to better control them. Which actually ended up killing off the very few that were left at that point. They'd already driven themselves to near extinction trying to use, and then dealing with the pure form of the creature they tried to use in the past.
The alien virus, however, is finding a way to return to it's pure form. The form we stumbled across in stasis in Alien. They had trouble controlling their pets back then, but after hybridization things were better for a time. This means terrible things for the crew and that the bodies that even the cobra hugger has been in begin to reanimate, and continue to mutate and reorganize for a new purpose much more rapidly due to the Engineers genetic meddling, but is still attempting to reach it's pure form.
Spoiler
Holloway probably doesn't like the fact that he was torched after he's reanimated (they don't know to torch every last trace yet). He's still becoming something else, so he makes a deal with the other two Devils of the film to stall and redirect the transformation, but still ends up loosing himself.