By what measure is a (hu)man?: On mutants and vampires...

[Winterous]

Consider it this way.
Anything that once was human still is human (barring being completely genetically rewritten / borged)
That is to say, a humans corpse is still human, a human vampire (as opposed to a changeling vampire, or whatever else)
Same applies to zombies or whatever else.

Harm is causing physical injury or debilitation.

Causing damage to a vampire(or zombie) or otherwise crippling them is harming a human (unless there is some admin silliness with changeling vampires, or monkey vampires)

Exactly, you get it