The virus in my blood is trying to steal my humanity. It alters my very thoughts and reactions. It taunts me by tempting me with desires that it planted in my brain. These bloodthirsty desires would lead to my demise if I ever gave in. I have more in common with the zombies than with humans at this point. Even the fallen zombies accept me as one of their own.
Blood is required to retain my grip on sanity, but the sweet-smelling blood from humans is a short path to madness. Human blood is to be avoided at all costs.
Humankind around the world was driven close to extinction by the sudden appearance of the zombies, yet small groups of survivors constantly manage to appear and put my control to the test.