Screenshot from a CCTV shows a new method of surveillance that could detect traces of the Solanum Virus. This new technology has been adapted by most countries and has been criticized with regards with the invasion of privacy and data collection.
Only drawback: Needs plenty of Nuke.
Concept art of the proposed "Ultimate Zombie Fighter" mecha. The end of the World War Z has brought back the possibility of using drones and A.I. to combat future outbreaks since zombies usually ignore them.
Kurdistan would be pretty obvious, especially with how them having "no friends but the mountains" would help them survive the war.
Somaliland celebrates its independence from Somalia after World War Z.
(What other regions would have fought a breakaway rebellion during the zombie war or was given independence afterwarsds? Feel free to add).