28DL Zombies (A.K.A. Boyle Zombies) technically aren't zombies. They are "infected".
The difference being they don't die and then reanimate. Boyle Zombies get sick and turn feral and spread the disease much akin to the way rabies spreads.
What is scary about Boyle Zombies is the scenario is all too plausible...
I hate rage zombies.
I want zombies that I can evade at a brisk walk.