Perhaps there is no diseased category,true, but you did hit the nail on the head: zombies are dead and the people in 28 Days Later are not. And I don't believe Boyle ever went and said that his movie was a zombie movie, that's more of the critics doing.
Look, I'm not trying to refute 28 Days Later as a good movie. I think it is a good movie, I just don't think it's a zombie movie. There are basic rules to what is a zombie, and 28 Days Later doesn't meet any of them. The people don't die in order to turn, you get infected just by being exposed to the blood, and the infected die within a month or so due to hunger and/or dehydration. To me that doesn't say zombie. No one rises from the dead. Hell, they don't even eat people, they just try to tear them apart.
And yes, I know that the screenwriters were inspired by the Romero films. Lucas was inspired by Akira Kurosawa, and used some of his elements, but I don't see Star Wars being taught in any Asian Film classes.
The premise of the movie spells it out clearly: Man creates virus that enduces rage. Virus escapes into the city, infecting the majority of the population. Those who aren't infected try and survive. Eventually they win because the infected die off. That is not a zombie film.
I still don't see why people think this film is a zombie film, and when I ask (see post #63) I get answers like the clever one from Leatherface. What makes this film a zombie film? I'm not being confrontational. I want to know your opinion.
Rumor has it that Boyle is doing a sequel, hopefully he'll shed some light on this tired subject.