Is it a virus? Do they actually use the word "virus?"
During the initial run of The Walking Dead, Kirkman was adamant that they didn't explain anything about the origins. The closest we got was during the CDC episodes when Dr Jenner revealed that "we're all infected." But the specific pathogen, if any, was never identified. I say "if any" because without a specific pathogen or category, it could be supernatural for all we know. There's just not enough information in the original show to know.
However, I now see that the wiki lists the origin as a virus from a biolab in France and cites this show's post credit scene as the source.
So has anyone seen this? Did they specifically say "virus" or is this another case of fans and viewers assuming they meant virus specifically, when really it could have been left open?