I don't recall he said anything, but the scientist could be wrong.
http://answers.yahoo.com/question/index?qid=20120311193544AAH1wIa:
"The show is playing out just like the comic series in this regard. The only real difference is that the comics revealed the details far earlier, within the first few issues. Yes, it's unusual in comparison to the usual method of operation for zombie apocalypse fiction but it's how this specific outbreak works. Go figure.
Ask Robert Kirkman (the writer of the comics and one of the show's producers) if you want to know why. This was his call.
Further, relevant details (at least in regards to how the virus works in the comics):
Time greatly varies between death and zombification, sometimes it is an instant process (rising within seconds after death) and other times it takes far longer (days). There is no real pattern to this, and, at least at the moment, seems rather random.
People do NOT need an infected wound (nor even just an open one for that matter) to become a zombie. It happens to EVERYONE when they die.
The process is NOT speeding up. Someone will die in the future and they will not rise as a zombie nearly as fast as Shane recently did.
The zombies in The Walking Dead are NOT based on the concepts put forth in the Zombie Survival Guide. The two are COMPLETELY unrelated. In fact, Robert Kirkman has specifically stated in many interviews that he avoids zombie fiction (he even explicitely mentions Max Brook's two books, the Zombie Survival Guide and World War Z) like the [zombie?] plague [I kid] in order to keep from (even accidentally) absorbing info from other zombie mythos and inserting it into his own. He want's his own story to remain as original as possible.
PS: On a somewhat separate note, if you like the TV series I HIGHLY recommend reading the comics. It is easily one of the greatest comic books written in the past decade.The show is playing out just like the comic series in this regard. The only real difference is that the comics revealed the details far earlier, within the first few issues. Yes, it's unusual in comparison to the usual method of operation for zombie apocalypse fiction but it's how this specific outbreak works. Go figure.
Ask Robert Kirkman (the writer of the comics and one of the show's producers) if you want to know why. This was his call.
Further, relevant details (at least in regards to how the virus works in the comics):
Time greatly varies between death and zombification, sometimes it is an instant process (rising within seconds after death) and other times it takes far longer (days). There is no real pattern to this, and, at least at the moment, seems rather random.
People do NOT need an infected wound (nor even just an open one for that matter) to become a zombie. It happens to EVERYONE when they die.
The process is NOT speeding up. Someone will die in the future and they will not rise as a zombie nearly as fast as Shane recently did.
The zombies in The Walking Dead are NOT based on the concepts put forth in the Zombie Survival Guide. The two are COMPLETELY unrelated. In fact, Robert Kirkman has specifically stated in many interviews that he avoids zombie fiction (he even explicitely mentions Max Brook's two books, the Zombie Survival Guide and World War Z) like the [zombie?] plague [I kid] in order to keep from (even accidentally) absorbing info from other zombie mythos and inserting it into his own. He want's his own story to remain as original as possible.
PS: On a somewhat separate note, if you like the TV series I HIGHLY recommend reading the comics. It is easily one of the greatest comic books written in the past decade."