The film isn't necessarily violent, save about 45 total seconds of the film, but there is a lot of blood, as the primary character is infected with a disease that causes him to spurt blood in a number of ways, specifically by vomiting. There is an entire sequence at the climax of the film that has the main character drenched in his own blood due to his sickness.
There is one moment in the film where the main character is cut open and had something forcibly put into his body, but the moment is short but intense.
There is another moment where the main character stabs another character in the lip with a syringe. The scene is short but when the aftermath is shown it is mildly bloody.
Part of the plot involves the flesh of celebrities being cloned and produced in mass quantities to be sold for consumption in butcher shops. Seeing this suppose human flesh being chopped up and sold is gruesome.
Mainly the movie is just extremely intense; it feels bloodier than it is, and it feels much more violent than it is. It's truthfully not terribly violent, although in a medical context the blood is flowing by the end of the film.