What are they? Zombies?

Walkers?

He pulls the scarf lower again to reveal the quickly healing but still painful looking wound on his neck. The outline of a set of teeth clear and apparent.

More like what are we?

Not slow zombies like in the walking dead. More like 28 days later type zombies, fast and bloodthirsty. What were they called? Infected or something? Infected with what?

I never got why zombies walked so slow in some movies. For something that relied on living tissue as a food source, specifically human flesh, which is hardly something you could describe as an easy target. They didn’t seem to be designed for