Zombie Child Development in The Girl with All the Gifts

Last night, we watched The Girl with All the Gifts. I haven't played The Last of Us, but from what I know, it's kind of like a movie version of that game. It was enjoyable, despite some of the questionable science and character motives. (Slight spoiler) The main character was one of many infants in a hospital maternity unit; the mothers had been infected and the babies cannibalised their mothers. They didn't go into the idea at all, but because the kids are all now living, contained in cells on a military base under lockdown, we must assume that military personnel had to round up and transport these zombie babies at one point. I'm imagining a deleted montage scene with some Benny Hill music of some inept soldiers trying to figure out how they are going to round up these babies and transport them without getting killed. Then, there are the additional questions of of how these babies could have possibly grown and developed in captivity while simultaneously being unsafe to be handled by adults. Anyway, it was a fun sci-fi/suspense/zombie flick. Just suspend your disbelief at the door.