The Girl with All the Gifts by M.R. Carey (2014) Orbit

A post-apocalyptic science fiction story with a well-thought-out explanation of a cause for the zombie-like devastation of the world.  In Carey’s explanation, a spore spreads through the human race that started in the Amazon on the floor, attacking ants, who try to rub it off, but when infected will climb the nearest tree, attach themselves to a leaf and when the filaments of the maturing spore finish devouring their host, explode and spread their spores further along the floor of the rain forest.  In the humans, it travels the nervous system to the brain, replacing the intelligence of the host but controlling the motor functions.  A bite will infect their target.  But what the scientists discovered is that there appear to be children running around without being attacked but are obviously infected.  They capture some of these, take them to an airbase and then educate them. 

This is the story of how one of the little girls, Melanie, learns how the human race will continue.

Every child in the captured group, lives in a cell by themselves.  An alarm rings in the morning and they get dressed and sit in a wheelchair.  The door opens and two soldiers enter, one with a gun aimed at the child.  The other soldier ties the child into the chair and then wheels them into a classroom.  There, the teachers rotate each day, teaching different subjects.  One day, the base is attacked by Hungries (the zombies) herded by the Junkers (people who are not infected but did not evacuate to the uninfected areas) and the base falls.  Melanie, her favorite teacher, a scientist who was about to extract Melanie’s brain to inspect under the microscope, the Sergeant in charge of the military at the base, and a private escape.  But their way from there is not easy. 

The Junkers pursue them.  They try to hide but find themselves surrounded by the Hungries.  Melanie finds the Hungries do not see her.  They discover an abandoned mobile research vehicle and make their way inside, but it is inoperable.  The Sergeant works on restoring power and Melanie does recon, where she discovers a group of children, but they are operating as a savage tribe looking for protein (people) to eat.  The private becomes their first victim.  The scientist traps one of the kids and starts examining their brain tissue under the electron microscope and leaves the others behind who were looking for the private.  When she comes across a wall of the fungus, she stops and finalizes notes about the difference in the second generation of infected hungries, the kids, and realizes that all is lost.  Melanie tricks her into opening the door and then listens to her as the scientist, knowing she is infected and dying, explains what she has found in the kids.