As Shane takes the prisoner out into the woods and breaks his neck and then fakes an injury to claim self defense, some are suspicious . Rick and Shane go out together to find the prisoner and when reaching a desolate spot,Shane tries to kill Rick,but gets stabbed instead. As Rick laments over it, his son watches as Shane becomes a zombie himself and goes for Rick and is shot by his son. The question is , Shane and Randall were not bitten but still became zombies after death. Is this airborne?