*I'm new so i'm not sure if anyone has asked this question yet*
How the hell did this all begin??? Who or what started the original outbreak? Who was patient zero and how were they infected? Is the zombie infection viral or bacterial or is it of a symbiotic nature? What was the cause of the first zombie? How the hell did this all happen to begin with?

I know that I have asked a lot of questions. I would deeply appreciate any clarification on these questions that is available. Thanks.