Heres the official Review -
MPAA RATING: R for strong bloody violence, language and some sexual content/nudity
Starring Rhona Mitra, Bob Hoskins, Adrian Lester, Alexander Siddig, and Malcolm McDowell
Authorities brutally quarantine a country as it succumbs to fear and chaos when a virus strikes. The literal walling-off works for three decades--until the dreaded Reaper virus violently resurfaces in a major city. An elite group of specialists, captained by Eden Sinclair (Rhona Mitra), is urgently dispatched into the still-quarantined country to retrieve a cure by any means necessary. Shut off from the rest of the world, the unit must battle through a landscape that has become a waking nightmare. (Universal Pictures)
DOOMSDAY is a fuckin sweet film. Violent, Bloody and Decrepit are all words i could use to describe this film.
Think about 'Mad Max' crossed with 'Lord of the rings' and 'Saw' and your close to what it resembles. Heads getting smashed and chopped off are just the lightweight stuff you see in this film.
I advise you watch it and tell me what your impressions are of it....