If you haven't read any World War Z (An Oral History of the Zombie War), I can't recommend it enough. The movie was "okay" but had nothing to do with the book, which is a collection of short stories from survivors of the zombie plague. Some of the best involve the original infection.
Heh, my dad even remembered one of them to me recently, the otaku's story. Perhaps the best informed, yet least aware...
World War Z was great, don't get me wrong, but it's not quite what I'm looking for. Since all of the stories are being told from first-person perspectives, it doesn't really deliver the bigger picture regarding the actual spread of the zombie plague. There's a lot of hindsight contemplation, but nothing to really explain how the disease hit epidemic proportions in the first place (especially since, in the first story, it appears that Patient Zero was euthanized pretty quickly along with all of his victims).
Let's go back to The Stand for a second. There's a sequence that goes pretty much like this:
"Sheriff Bob is sick with the superflu, though he doesn't know it yet. He pulls over a guy for speeding and gives him a ticket - and a death sentence. This guy is an insurance salesman named Bill, and after getting let go by Sheriff Bob he drives to a diner for lunch where he infects everyone, including the cute waitress and the tourist family he gives directions to on his way out. This tourist family, let's call them the Johnsons, drive west to Nevada and check into a hotel. The kids swim in the hotel pool (infecting all the other kids, who are heading off to all sorts of places with their own families) and get sick the next day. Mr Johnson is pissed that his perfect vacation is ruined, but he and the Missus take the kids to the local doctor's office. There were twenty other people there for various ailments, along with the doctor, the nurses, and the receptionist, and sweet old lady named Muriel. All of them are exposed. After work, Muriel heads off to her bridge club and wins handily, then she goes home and infects her daughter, who goes to school the next day..."
That's what I like. I like seeing exactly how the situation deteriorates.