Gotta tell ya, Kingdom is a damn solid Zombie series that came out from Korea. It is still on Netflix.  If you are a fan of "Train To Busan", the makers of that movie is responsible for Kingdom.  Here's Cosmic Fury's full on spoilers and discussions on it. More Links at - https://www.youtube.com/watch?v=IZLfUNvlpas&t=1922s