Ok, I really don't get the purists fudging their Huggies pull-ups about the movie not being faithful to the Matheson novella; I read the book and it SUCKED, sorry. I'm not some video-head ADD kid who only watches movies and hates reading because the words make my head hurt, either. I read an ass-load of horror and sci-fi, I'm also a big fan of Matheson's work in general, but IAL the novella was a phone-in for him. If they'd made the movie faithful to the book it would've been two hours of watching grass grow. It wasn't scary, it wasn't suspenseful, the vampires were weak, the science of the explanation for the plague was a joke (he was immune because he was bitten by a vampire bat in Panama?!? Are you fucking with me right now?) and the protagonist was a typical 50's-era angst-y crybaby (and before you try to call me on a technical point, I know the story was set in the 1970's, but was written in the 50's). I've seen all three film treatments and ironically the most-maligned one, Last Man On Earth, is the one that's most faithful to the book.