Greece

"The blood trail led up the mountain path from the massacre in the wadi. A lot of blood. Anyone who lost that much wouldn't be getting up again. Only some how he did. He hadn't been treated. There were no other track marks. From what we could tell,. this man had to run, bled, fallen face down- we still could see his bloody face mark imprinted in the sand. Somehow, without suffocating, without bleeding to death, he'd lain there for some time, then just gotten up again and started walking. These new tracks were very different from the old. They were slower, closer together. His right foot was dragging, clearly why he'd lost his shoe, and old, worn out Nike high top. The drag marks were sprinkled with fluid. Not blood, not human, but droplets of hard, black, crusted ooze that none of us recognized. We followed these and the drag marks to the entrance of the cave. There was no opening fire, no reception of any kind. We found the tunnel entrance unguarded and wide open. Immediately we began to see bodies, men killed by their own booby traps. They looked like they'd been trying...running...to get out." (19)

World War Z- Max Brooks
Biotechnology and genetics

Max Brooks takes on the view point of a Greek soldier because soldiers were probably the first to deal with this monsters.  In Greece, they were almost unheard of until they saw the track marks in the dirt and followed it to the cave where there were lifeless bodies of soldiers everywhere. They were probably running to escape the undead in such a rush that they ended up being trapped into their own booby traps, or perhaps they fell into them on purpose because that was a far better fate than becoming a zombie themselves. This shows the fear and desperation of humans and how they're not invincible. They're breakable and the human race can't defeat everything no matter how hard they try.