That's the terrible thing, isn't it? Kenny was never bitten. He was human. A bite kills a person, and then their dead corpse (free of any hint of who they were) comes back. He would have continued being human and alive if Clementine hadn't put a bullet in his head. He wasn't the first person she's killed. He's the first person she's cared about who wasn't going to become a walker--

Who could have kept living, who posed no threat to Clementine-

"No." She closes her eyes and leans into Iris' touch quietly, closely. "I came to in the car. Jane and Kenny were arguing. AJ, he was just born, and he- he was crying."