Daybreakers

Daybreakers is a 2009 sciencefiction horror film written and directed by Australian filmmakers Michael and Peter Spierig. The film takes place in a futuristic world overrun by vampires. A vampiric corporation sets out to capture and farm the remaining humans while researching a blood substitute. Lead vampire hematologist Edward Daltons Ethan Hawke work is interrupted by human survivors led by former vampire Elvis Willem Dafoe, who has a cure that can save the human species.

In 2009, a plague caused by an infected vampire bat has transformed most of the worlds population into vampires and due to this event, control of the world no longer belongs to humans. The vampires are incapable of aging or dying from natural causes, but are unprotected against sunlight or any ultraviolet light. The entire vampire world is active at night, and various technological and architecture advances are made to adjust the populated areas to vampires night cycle such as UV protective cars, underground railways and paths across the cities, and UV warnings.However, human numbers quickly dwindle, and the need for blood becomes desperate. When deprived of blood for extended periods, vampires degenerate into subsiders, psychotic batlike creatures who lose their memories and independent thought and are left with the basic need for blood. Humans are captured and harvested in laboratory farms while scientists research a synthetic blood substitute to satisfy vampires blood hunger across the world, while animal blood is also widely used. ........

Source: Wikipedia