So what started turning people into zombies?

Rating: 1/10 (19 January 2007)

Awful movie I mean come on first its a lady who sees a girl named Vivienne on the way home then she has a skate around the block, the nurse walks home has a quickie in the shower comes out then all the sudden Vivienne has all blood over her.
The girl bites her boyfriends neck he dies and instantly turns into a zombie the nurse lady runs out and quickly jumps in her car and speeds off then AMAZINGLY first time in zombie movies I've ever seen. These zombies have I.Q and good physical strength.
After that the starting song goes on and all you see are some military troops getting killed, some black guy saying that he doesn't know what caused it.
Then throughout the movie they hide in a mall having sex, having a party, then when Andy the guy next door dies they decide to make a break for it.
They make an armoured car with chainsaws, and other weapons such as shotguns, and rifles then when they drive out about 4-5 of the 10 die 3 already died in the mall because they got shot.
They run to the docks board a ship go to some random place some girl who was never seen on the movie takes off her bikini then they crash into a weird island and go off then you can see a hundred zombies run to them.
Overall HOW THE HELL DID THE ZOMBIES GO ON THE ISLAND THEY CAN'T SWIM? WHAT CAUSED THE OUTBREAK? WHERE WERE THE MILITARY? ITS BASED IN USA I'M SURE EVERY American HAS A GUN HOW CAN ZOMBIES RUN,JUMP THEY DON'T HAVE ANY IQ LEFT.
cant give it any lower than 1