What've We Been Watchn'?

This is the second part to a Spanish movie we watched on the World Movies Network. Basically there's an apartment building that gets completely sealed up by "the authorities" because of the tenants having gone ape-shit crazy and displaying rabbi-like symptoms. It's filmed in a "Blair Witch" style with an unsuspecting television crew getting accidentally caught up in the mayhem when they attend a fire with the fire brigade (whom they're supposed to be filming a doco on). Turns out that the problem all stems back to a possessed girl that secretly lived on the top floor of the buiIding. She truly has the negative Midas touch - everything she touches (or bites) turns to shite. Nothing ends well for any of the protagonists.
In this second installment we pick up the story with a medical/SWAT team going in to get a blood sample from the girl to develop an antidote. The residents are still wild and waste no time in attacking the team. After one attack the Doctor leading them reveals that he's actually a priest. He discloses that the patient zero was possessed by the devil and the Vatican sent him to save mankind. A good one to watch with company so you can pretend to be brave and laugh (nervously) through the scary bits.