The infected retain their intelligence, ability to reason, and speech.

Unlike standard zombie films where victims become mindless drones, the "Alvin" virus in The Sadness mutates to strip away human moral restraints.

is widely considered one of the most extreme and viscerally upsetting horror films of the modern era. Directed by Canadian filmmaker Rob Jabbaz in his feature debut, this Taiwanese production transforms the traditional "zombie" outbreak into a sadistic, nihilistic nightmare. Core Concept: The "Alvin" Virus

They are driven by their darkest, most sadistic impulses, acting on hyper-violent and lecherous urges with zero remorse.

Some infected appear to be aware of their horrific actions—one character is seen crying even as they commit atrocities—suggesting they are conscious but unable to stop their own impulses. Plot & Production