I was a bit disappointed with the beginning since it seemed to be exactly like 28 days later...Thought I was watching the movie at first.
I know. I actually called BS on the show during the beginning, but I took it back after the story picked up.
Bad injury -> Coma -> Wake up -> Hurt yourself on IV needle -> Find hospital interior demolished -> Check phones (not working) -> Wander around -> Find zombies
Pretty much the whole hospital scene is the beginning to 28 Days Later.