The Ganados (Singular Ganado) got introduced to Resident Evil fans back in 2005 in Resident Evil 4. They are the first enemies of the Plaga Saga of Resident Evil (Resident evil 4 to 6). I remember in an old Resident Evil 4 ad that cannot find anymore, Leon mentioned they are not Zombies. The Ganados looks less grotesque than zombies, they just look like ordinary people, they can still talk and even do mundane stuff like farming and gardening. They become hostile though the moment they see a stranger not infected by Las Plagas. Las Plagas is an ancient parasite responsible for the extinction of dinosaurs. An infected person is mind controlled by the one who possess the Queen Plaga.