That, my friend has hit the nail on the head. i couldnt agree more especialy when comparing other movies(recreations?) with return of the living dead(toxic vapors/waste). however I cant explain why the dead were rising from the grave(digging free) I suppose the answer would be more of an aggressive microparasite/virus that controls or awakens a long lost behavior pattern(which would explain ease of contamination of the living) or otherwise animates unliving flesh.
Well we don't no jack spit about a true zombie "agent". It could varie from a bacterial or viral infection that changes the process and distribution of nutriants to the body's tissues and organs. Even on a more complex level or some odd genetic abnormality that changes the nature of our DNA causing the behavoir. Or (along the same concept) that the brain acts like a parasite to the rest of the body and stealing nutrients from the rest of the body and doing every thing in it's poweer to get more food to extend it's life. (once again on same concept) maybe the brain becomes self supporting in some way like oxygen. i will continue this but for now g2g
obviously your right about not knowing anything about a true zombie. but at the same time this book is going with the premise of an undead zombie. no one knows how or why it could happen, popular idea is a virus, tho what the virus would do in actuality is anyones guess. and is such a hotly debated subject that it will not even be part of the book. the book is about preparing for an undead invasion and surviving in an undead world. it will not go into specific origins of an undead zombie.
So this book will only be based on the popular idea of a slow moving (maybe fast) zombie that may or may not just rot away? I guess that is the best we could do for now, besides we can always correct the ROE.
A corpse that has been reanimated for some reason or another that has no feelings or emotions, and lives off only primal insincts and human flesh. At first it would only have basic motor functions but after 2-5 days depending on the temperature (If it's cold it'll take 5. If it's warm it'll take 2) Rigor mortis would wear off. So, if a zombie survives that long after death they could have all their motor function back.