There is no overly graphic violence in this film, but the premise has to do with infection and disease.
Many characters are shown with evidence of the disease (veins standing out, severe bruising, bloodshot eyes, coughing up blood).
A defenseless victim is shot by a group of men after being pursued by them. The victim's bloodied corpse is later shown hanging above a road.
Several dead bodies are shown. Some are moderately decayed.
A man shoots at two other characters without warning. One of the victims is shot in the neck (a small amount of blood flows from the wound before camera pans away). The other victim shoots the man in the leg (the wound is shown). The man then shoots the remaining victim in the torso.
A dog is seen eating a dead human. This is not extremely graphic, however (only blood is shown).
A dog is shot point-bank with a shotgun (offscreen).
A character is shot multiple times (seen from far off).
A charred corpse is shown in a fire.