Like WWII movies, zombie films are a dime-a-dozen. Everyone is so familiar with the real-life history involved that they practically write themselves.
Actual WWII footage suffers from grainy, black-and-white film stock so you rarely see actual footage used anymore. Zombie films deal with a contemporary crisis and have the advantage of thousands of teams of professional news and amateur photographers.
The 2004 remake of Dawn of the Dead is one of the few examples of actual zombie footage used in a fictional zombie movie.
Some have argued that using this real footage so soon after the real-life events was exploitive, but it got the point across even if the rest of the movie contained common fallacies.
Take a look at the (slightly disturbing) clip of the film's compelling opening above. Even if you don't like the content, you can't argue with the use of Johnny Cash.
The Movie (dawn of the dead) is a classic but also ad's a reality theme about what would it be like if a event like this accured.
What ever the case is i believe in (zombies, walking dead) because in the world today seems like strange but truthly take's you on a story of hatred and war.
In every zombie movies out there is another way off saying the world isn't what it seems anymore but also there is a secret trying to brake free.