system
Given the following post, respond as if you're commenting on Reddit:
human
[Left 4 Dead] What makes the Special Infected, well, special?

Passing thought I had. Why is it that the Special Infected (Hunter, Smoker, Spitter and the like) have almost superhero like abilities? Is it some sort of mutation of the virus? Was it something about their lives as a Humans?
gpt
It's genetic. The protagonists canonically literally get the same sturdiness as zombies but aren't affected by the mind altering zombification part. It's covered in the comic. Presumably the special zombies are similar in that their genetics allowed them to mutate in such a way when they were infected.

Seems to also have a gender trait since some of them are specifically a certain gender (Witch)