Signs of the Infected

You duck cowering in the doorway. Behind you, you hear a loud thud. You look behind you to find the monster that had been chasing you was a zombie after all. It now laid there on the floor with its head blown off. Green blood oozing from what was left of it's neck. You stand and look the man directly in the face. He smiles at you.
"Well, well, well. Looks like I have a guest. Come on in and make yourself at home."